This is our second.  We have one upstairs and one in the playroom. Our son has ADHD and as he is almost 9, we have to keep getting bigger mini tramps to help him work out the wiggles. I love this style, as there are no springs, so nothing to rust or get feet stuck in. And bigger kids are strong so the  "spring" is just enough to get some air but not too much to get launched! I also use one in my classroom for my "special" friends who have the wiggles too.  Our older model has been being used for 4 years and has zero damage. It looks brand new.