Simple and easy to put together. Rabbits love running through the Zippi tunnel and into the pen. It does need a lid/roof otherwise the rabbits can jump over the walls. Our rabbits are Netherland Dwarfs.
The playpen is ok, does the job, but once our bunnies grew a little (6 months old) they started jumping out and we found out that, this cannot easily be extended, as suggested in the description. Sure you can by more panels and make the area bigger, possibly even add a roof, but you cannot easily extend it upwards. So if you expect to have bunnies than can jump a little best avoid this in favour of the taller version.