My son and I found this playpen to be very enjoyable. The set up was very easy and was done in several minutes. The sides slid into one another. My almost 2 year old son was not able to get the sides apart and break out. The plastic sides were good quality. They were thick enough plastic without being overly heavy. There is a door with a lock. My son was unable to get out of the door when he tried. When I opened the door to let him out, he wanted to get his sister or me and bring us into the play pen. There is a basketball hoop in the playpen that you screw on by a twist of a cap. It is on pretty sturdy although the hoop itself is bendable. This was a very enjoyable ... full review
Great quality. I can sit next to this pin/mat without worrying about her falling knocking her head. (we are moving into our new, which is why I move the pin in front of the television. Not usual spot, before I get attacked for child endangerment. lol the television is also attached to wall.) Just wanted to share for those pending about purchasing this pin, it's great. I purchased 2, but didn't add all the panels. I also didn't add the teddy bear sticker, she would definitely peel and try to eat them.
We purchased 4 sets of these to setup an outdoor play pen for our 1 1/2 year old triplets. Makes for a reasonably sized play area, and so far they haven't though to really try to scale them. Not really many places they could grab a foot hold which is nice. I love the flexibility of how they attach, makes it easy to arrange the space however you want. Very lightweight too, which makes for easy moving when we have the lawn mowed. Can just drag it out of the way.
I used this playpen at work for a year. Purchased when my daughter was almost a year old. I had to take it in and out of my car everyday at work and I was worried that it wouldn't hold up due to it being hollow plastic. I was pleasantly surprised! It held up so well that I will be able to use it again for the next baby. My daughter is now two and knows how to stack things so she can climb out and she's tall. However she has never been able to figure out how to unlock the gate. All the toys on the toy panel still work and have held up despite my daughter being rough with them. None of the connector pegs have come off during transport. I really worried they would pop off since they weren't solid and were jostled in my car all the time!