We wanted to get a trampoline for our kids and did a ridiculous amount of research. A big plus was being able to go to a local store and actually allow the kids to bounce on their demo trampolines in order to determine the size that would be most appropriate for our four kids (13, 11, 7, 5).
They are out there every single day - having an absolute blast. And that's in the winter. My expectation is that come the summer they'll be out there all the time. Expensive but definitely worth the investment - more money than cheapo Walmart specials but I expect this to last a long, long time.