Hello,
Ok, we purchased one of these, the square one with the handle in the corner, for our 2 youngest kids who had sensory issues and were told it would be GREAT for their therapy.... and although they loved it (the jumping, etc) the trampoline just didn't have the "bounce" that a regular one does. We got it through the JC Penny catalog, and used it for about a year, and ended up going to the bigger, traditional outside model with the net around it for safety. My kids were about 5 and 6 when we bought this first one, so maybe that was part of the issue, (they were too big) but when they jumped in the trampoline, it didn't have the normal bounce that you would expect, and if you don't set it up just right you will find yourself with the jumping part actually on the floor. I ended up giving it to a friend for her 2 yr old, and he LOVED it!! It worked great for him, as he was much smaller and his Mom didn't want him getting all that much "bounce" out of his jumping anyway. One other note, I found that my kids would use the bar as a sort of gym bar, and would look for ways to trirl themselves around it and my daughter almost got stuck on it upside down one day while I was in the bathroom. :( I ended up having to make it an "Off limits" toy when I was not there to supervise. I hope that helps. FYI- we have NEVER had any issues with our bigger outside trampoline, and have had it for many years. All of our kids love it, even the older ones. Good luck!