We've had the bounce house for about 3 months now.  The kids (ages 2-5) absolutely love it, and I'm happy that it works well wet and dry.  However, my husband and I are on the fence about how much we like it because of our safety concerns.  When there are about 3 kids sitting at the top of the slide, they could easily lean their body weight toward the edge of the unit and it could lean the unit.  We used sandbags as anchors and quickly learned that we also needed one adult on the side of the bounce house at all times in case the kids did lean the unit.  We also learned to keep one adult in the bounce portion to help the younger kids climb up.  My 2-yr old can do it on het own a couple times, but tires quickly from trying.  In conclusion, it's a great unit, but definitely not one that I'd feel comfortable having my kids use without 2 adults very close by.