Story - The story is simplistic but it has huge degrees of charm which I can't really say for a lot of other anime of this type. Why is the story simplistic? Hugely because it was almost certainly made for children so reviewing it from an angry teenager's point of view isn't fair. Alas, the story involves animal personifications, known as friends by the show and a lost girl wandering Japari Park (A Zoo). They meet more friends and overcome small challenges on their way.
There isn't much more to it than that but where the beauty comes from is there is a lot you can speculate about the story which makes things appear a bit darker but you would need to watch for yourself to really get a feeling of that.
Art - The killer for 99.9% of people it seems. I'll admit off the bat, it's not perfect but it's not the worst. Kemono Friends is 3DCG and yes, some of the movements and what not are slightly awkward but when you get past this it almost gives a weird extra level of charm to certain characters? Take for example, the way Serval walks - she has what looks like an awkward swing to her arms when she moves but it almost becomes adorable when you are able to get past the "oh so unholy" art that people believe in.
Sound - The best part in my opinion. OP is great, character's voices are great, background noises are also great. Not much else I can really say about this.
Character - Just like the story, characters are simplistic but have a lot of charm. Each and every one is based around an animal (or a bag in Bag-Chan's case). This serves to teach about animals of the world to the point intermission scenes will show a certain character in their natural environment with a Zookeeper from real world zoos talking about the animal in question. This not only serves to educate you but also to a degree helps you understand the characters on a better level.
Enjoyment - Personally, I really enjoyed what is available to me at the time of writing (7/12). I'm very likely to watch it to the end as again, the charm really hits hard and I am incredibly curious about if the darker side that appears to be there will be touched on in the actual story.
Overall - Cute and simplistic 3DCG anime, definitely worth a watch if you're not expecting Sword Art Online Season 3 or something like that. It's strongest point is easily the amount of charm. Really recommend this.
