Inflatable slide (Birthday’s gift)

    I found one of the giant inflatable on this website: http://www.yginflatable.com   and I was just wondering what experiences you have had with them? The style is better than ebay, it is for the same product buying it in the store, as they are very expensive. I have read a lot of negative reviews about the wear and these slides not holding up. I have also read reviews of positive experiences. I am thinking of purchasing it for my niece's birthday, and she is only 6 years old so I figure she can't do too much damage to it, but just wondering if it would be worth the little bit of savings to get it from ebay or if I should buy it new in the store and have a receipt...or is it a waste of money and I should just forget it all together. Thanks!