I have 3 rabbits of my own (2 dutchies and a large lionhead), I also foster various rabbits of various sizes and ages.
They have ALL so far loved the maze. No issues with fitting in it, and they have played in it a lot.
The house+garage is best for couples or one large bun, maybe.
My lionhead and one Dutch have that and like to smush in there together.
The castles with the walkway is a fun one for a single, my bonded pair like it ok too when one wants to isolate from the other.
All in all, s...