After lots of research products like this we took a leap of faith, based off other negative reviews, and decided to purchase the item anyway. I am 1000000000000% glad we did! I didn't want to spend $150 to rent a bounce-house for my sons party so started looking for alternatives. I came across this and was torn between this and the other yellow round one Amazon offers around this price. It's great. We really love it!
It withstood the party and is now up in our playroom for indoor days! My son 1, another 1yr old, a 2yr old, 3yr old, 2 4yr olds, and a 6yr old. They were all in it at once and there was plenty of room to bounce/play.
As with any plastic toy you'll want to blow it up 90% of the way and give it a good 6-8hrs before use to expand and stretch around the seams. We aired it mostly up the night before the party and then completely up at the party, which was on a concrete floor with no padding, and didn't have any problems. It feels very durable unlike the cheapo pastic-y feeling pools. I would also recommend this over the yellow round one and even the one thats round and sold at Walmart because the posts help hold the weight in. So if your child loses his balance and falls not only are the walls high enough for him not to fall over, but supported by the other sides and will hold up pretty nicely. With the others it looks like they could fall out or the plastic wouldn't support someone toppling over the sides.
I would definitely say this is not for older kids 6+. Its more geared towards younger kids who don't need to be tossed very far ;) The actual bounce piece is a blow-up mattress type thing inside the walls, you blow the base and towers up, then sides up individually, then the bounce part inside. If you're looking for something super bouncy or for older kids this is not it. The 4yr olds and 6yr old all got in it and jumped around rough-housing a bit and it held up just fine but I can't imagine older kids really enjoying it and possibly being too rough.
I would recommend it. Amazon has a great return policy so even if you are on the fence I'd take the chance and give it a try yourself. I'm not sure why the others have such negative reviews on the product because I had none of the problems they seem to have had. Air it up about 90% and let it sit for a while, overnight/whatever, and then finish blowing it up. That's just common sense when using plastic-y products. I will write another review a few months down the line to let you know how the product is holding up. Overall we are very pleased and consider this a great buy!