Does anyone own a back yard water slide like this?

These slide burst at the seams with much less weight. We bought the Banzai Double Raceway slide (weight limit 400 lbs) my two kids weight less than 180 lbs together and the seams are bursting. They have only used the slide 6 times. I think the problem is more of a workmanship issue. Don't waste your money. For other similar comments go to toys r us.com and look at the reviews other parents are leaving.