Are you looking for a good, fun, light-hearted adventure? This has that.
Are you looking for a wonderful, sci-fi thriller? This has its thrilling moments.
Are you looking for wonderful chemistry between the characters? This presents that.
Do you want an anime with well-animated fight scenes? This gives us that.
Are you looking for an anime that has a wonderful staff backing it up,  always checking to make sure they bring out the anime’s fullest  potential, based from its manga source, faithfully adapting it? They  both have, and do that.
Made in Abyss is an anime that can abide to almost anyone’s taste in anime. I personally believe that Made                    in Abyss is an anime and manga that will ring throughout time as one of the best classics to come out in recent years.
Why? I’ll tell you.
As said before, Made in Abyss has a staff of people running it that  always checks to make sure that every episode is doing great, always  trying their hardest into their works. A wonderful story, great  character chemistry, a harmonious soundtrack, effects, and voice actors,  and beautiful, fluid animation. All of that came onto the screen  because of such a wonderful staff (except story, for the most part.  Credit to the author, Akihito Tsukushi!). Everything about the series  was able to grab me and pulled me in like a roped hostage on a train or  bank scandal. While that may sound rough, what is truly meant is that,  just from the first episode, I could tell that Made in Abyss was going  to be great. 
In the first episode, it panels off immediately into a beautiful  waterfall within the first layer of the Abyss and then into an abundance  of flowers, trying to make you feel as if you’re standing right next to  the lead in their journey into the abyss. The staff did that to have  world build for the viewers, but it was a lot more than that. With the  waterfall and pacing through the first episode, the waterfall and what  happens after foreshadows what is to come later in the story. EVERYTHING  that happens in the first episode is foreshadowing the story within the  Abyss. But let me get back to what happens shortly after the waterfall  and flower clip. We are introduced to the lighthearted driver of the  story and her friend, Riko and Nat. They walk down a path where they see  a gondola, foreshadowing that Riko will be going down into the abyss.  Then she goes on an excavation to find relics, only to find a dead body  in prayer.
And then.. The craziest part of the episode that foreshadows the darkness of the story.
A child, an inch away from death, from being eaten by the monster with  the most peculiar characteristics that will have importance in the show.  The monster can be compared to that of a Manta Ray, a slug and a snake.
Of course, because Riko is the main character, she cannot just standby  and watch it all happen. So, she tries to attract the monster away from  the child by blowing her whistle, and she runs away as hard as she can,  and she gets hurt. Just when it seems everything is hopeless, A robotic  child, or maybe I should say a knight in shining armor, saves Riko with a  blast of light, and is found unconscious shortly after. Riko can’t just  leave him, being the main character. So, she brings him. That robot’s  name is Reg.
Thus, starts the wonderful character chemistry between the characters.
With the first episode, whenever the characters interact with each  other, it always brings great joy for how well they work together. It  might be that the leads are kids (no, not lolis, they range from ages  10-12, and Kiwi is, like, 4), but because they are kids, it makes me  feel as if I, myself, am a kid again. Just watching them do what they do  across the screen, pulls my heart even more into the story. It truly  feels as though I’m standing next to them during their interactions. Due  to the leads being kids, they give off the light-hearted sense of  adventure. Living joyously, actively, and having fun. This is just  between Nat, Riko, Reg, and Sigy. Don’t even get me started on the  interactions with Lyza, Ouzen and Nanachi. Their interactions are some  of the biggest reasons why this anime is great, along with the fight  scenes. Lyza being the narrator, Ouzen being the badass grandmother, and  Nanachi (My favorite!) breaking your average anime tropes. If you want  to know how great they are, just watch the anime. After the encounter  with Ouzen, the story shows that, not even the main characters have plot  armor. The definition of humanity treads onto many uncomfortable  grounds for its viewers to display dark desires from within.
Another great attachment to the anime is the sound. 
The soundtrack is beautiful. In an instant, from hearing the insert song  from the first episode, I pre-ordered the soundtrack. The soundtrack  sounds as if it came straight out of a game, and really has an  adventurous beat to it. Thank you, Kevin Penkin. However, if I were to  compare the soundtrack to the sound effects, the sound effects are some  of the best sounds I have heard out of anime, especially when Reg shoots  his arms or laser. What I can describe those sound effect as, is  organic. With the voice actors, the kids sound like kids, and the old  adults sound like old adults. But, when the intensity rises, comedically  and dramatically, or narration within the anime, say, the fight scenes  and Maaya Sakamoto (Her narration is wonderful to hear), the voice  acting is great. It rounds about the sense of adventure, just like  everything else the anime provides. With the voice acting, one can tell  that there is passion going on behind the scenes.
One more thing to talk about that the anime provides is the animation.
I have not seen many anime with such fluid flowing animation besides  those of Ghibli films. Speaking of which, the background animator of  Made in Abyss comes from the Ghibli films! Will that motivate you to  watch and finish Made in Abyss? ...No? Okay, then I’ll provide more than  that to motivate you. Time frame 19:57 to 20:10 in the first episode.  That should be enough to talk about the animation, because animation  like that is all the anime will provide, making eye candy for the  viewer. From the grainy wood, to the cavities on rock walls, and the sun  coming over the horizon are wonderful details added by the animators.
Overall/TL;DR | Enjoyment: 10/10.
Made in Abyss is quite original in handling the fantasy setting, and I  have to say that I’m glad something like Made in Abyss was able to come  by. How the author was able to build a culture around an enormous crater  is quite plausible. Made in Abyss provides variety and satisfaction,  and it even provides the knowledge of the author, such as medical  assistance and ecological terminology. Made in Abyss is an anime I can  universally recommend. A great story that compels the viewer to finish  from the start, active and lively characters that can be described even  more as such through their interactions, the wonderful music from the  soundtrack, sound effects, voice actors, and the Ghibli-comparable  animation. I utterly, truly, from the bottom of the abyss within my  heart, recommend this anime to anyone who seeks a great story. Made in  Abyss provides just that.
