I had the ware playpen and I think it works great for some chins and not so great for others. I used it when I just had two chins and Maddie did great in it, however my trouble maker Mitzie didn't do as well. Mitzie began to chew on the zelcro that attachs the bottom piece on, it got the the point where she just wouldn't leave it alone so I had to stop using the playpen. I know someone else had similar problems, I am sure the thread will come up with a search. It is worth a shot I think, I found a good deal on mine and got it for a really cheap price (sorry don't remember the website) and when I sold it on craigslist, two people ended up getting in a price war with each other and I ended up getting the back the price I paid for it