My take will be to try to give some hints that will hopefully help you to decide if you're likely to like it or not. No need to waste 6 hours of your life if you're not a good candidate for this kind of shows.
This review should essentially be spoiler-free.
I believe you might like this show if:
1/ You're fine with non-linear storytelling
Wonder Egg Priority doesn't tell a story in a straightforward way. The plot inside a given episode will move from dream to reality and back, will not always present events in a chronological order, may show you how things really happened or how things were perceived by the involved character instead. There are always some hints to allow viewers to sort out this apparent mess, but it takes some thinking and possibly additional visions of the episode. This is made even more complicated because some topics that seemed very central in one episode can be basically forgotten after that, their resolution being only suggested by some hints two or three episodes down the line. It is a very sophisticated writing but it will put off a lot of people who don't want to turn a detective to enjoy an anime show, which is perfectly understandable.
2/ You're fine with having loose ends and unresolved topics
The show tends not to explain anything. A lot of events occur and there are here and there hints to understand why they took place, but it is very rarely strong evidence and almost always subject to interpretation. This can be frustrating to some but it also gives a powerful sense of reality and insecurity, as the watcher is almost as lost as the characters.
3/ You're fine with going with the flow
The writers obviously decided to play with the habits of anime viewers to categorize characters, behaviours and anime styles. They take a nasty pleasure to bait viewers with apparent evident behaviour or character type, just to fool them in the next episode. The fact is the show is completely unpredictable, always going where nobody will expect it to go, changing the mood, even the style along the way. Going in with a particular expectation will almost certainly be a frustrating experience, as the show will never be what you want it to be, it has its own path. You can only enjoy it, I believe, if you're willing to let go and accept wherever it'll bring you.
4/ You're fine with difficult subjects
Wonder Egg Priority brushes over many difficult topics, suicide of course, which is one of the main ones, but also all of the underlying reasons that may bring young people to this extent: rape, bullying, harassment, despair, and in a more general way how badly our societies tend to deal with females. It does so in a very modest way, never entering into graphic horror, but concentrating on the characters that endured the trauma. That's a very powerful and also very touching way of giving the possibility to talk, for people who, most of all, lacked the chance to be listened to when they were living. It does make the show sometimes very impactful and can be quite shocking. It is usually well balanced with lighter moments, but might still put off very sensitive viewers. How accurate this depiction of traumas may be is difficult to fathom. I can just say that all commentators I read, who claimed to have experienced some of the traumas described in the show, said it was very good at it, while none said the contrary. It seems to me a good indication that the writer did his homework properly.
5/ You're fine with multiple layers of symbolism
The show uses a lot of symbolism all along the way to convey some meanings. Each scene has obviously been given some thoughts on how to be framed and directed to be meaningful, and, although there is an obvious first layer that most people will find easy to decipher, there are many others that are a lot less obvious (check for instance the use of flower language described in various articles on the Atelier Emily blog). These lower layers give hints on interpreting what's going on or what some character said, usually illustrating the mood of the character or warning that what he/she says may not be the truth. You need to question whatever is shown, whatever is said, and not take anything at face value.
6/ You're fine with flawed characters
Characters in Wonder Egg Priority are essentially traumatized ones, and as such, they're usually not frank with themselves, let alone with others. They may not actually lie but have just incorrect views on many subjects, because they are biaised, because they are not knowledgeable enough, because they can't face some truth. In short, they are very real. They are at best unreliable storytellers and everything any of the characters say must be questionned and evaluated with the little information we have. This led to some controversies about specific sentences in some episodes, coming from the fact that too many viewers are taking them at face value. Most if not all characters can also be frivolous, unfair, real cowards. They're not heroes.
Wonder Egg Priority is a show like none other, for good or bad. Some viewers will see references to some other animes but that's because they concentrate on one episode or one aspect of the show. I find some similarities with Paranoïa Agent by Kon Satoshi, but that's probably just the non-linear storytelling, both shows are quite different in most other aspects. The truth is that it combines many elements coming from many sources in a very unique way. As such, it takes some radical stands, and I hope that the above hints will help you to decide if you should give it a try.
As for me, this is definitely my prefered show ever. I liked how I've been constantly surprised, moved, sometimes shocked, without ever relying to cheap tricks. I liked how the girls feel real and indeed 14-years old. I liked how all the difficult subjects are presented very delicately, without moral or judgement, but also without shying away from the painful truth. I liked how the edition and direction show a lot of attention to details. I liked how the animation so exquisitely renders teenagers movements and attitudes. I liked the usage of music and the direction of the voice actors. I liked the whole ambition of the project.
But I guess I'm right in the middle of the target audience for this show.
Hope it helps.
