I liked how easy it was to assemble. It basically turns around and emerges. I haven't tried it yet, so I can't rate it. My 14 month old baby loves it. I bought a set of 400 plastic balls and it was the perfect amount for the ball pit. Now of course I have to take the time to teach him how to keep them in the pit haha! I would think it would be cool if the tunnel could connect the tent and ball pit with zips instead of loops, BUT it still works and is worth the money. Balls can slip where it is connected.