This is a decent harem manga provided that you enjoy this genre. As someone who isn't into harem, I surprisingly had a pretty good time with it too. But for future readers, you have to remember what it essentially is if you don't want to be disappointed by the story.
What I liked:
+ beautiful art style
+ the story is quite plot-centered
+ underlying mystery and interesting twists
+ meta undertones
+ likeable and smart main protagonist
+ diverse and interesting cast
+ Alice is loved by all for a reason
+ everyone gets enough screen time
+ good character interactions
+ decent character development
+ good drama and action
+ romance isn't too over-the-top
What I disliked:
- setting could be more Wonderland-like
- secondary characters are psychopaths
- the romantice isn't too engaging
- characters have plot armor
- not enough room for story progression
- dark humor, cursing
- many questions are left unanswered
- the ending is left open