I was always leary about getting one because I've heard of the injuries. However, we bought one for our 3 boys about a year ago. They love it, their friends love it. We got one with the padding over the coils, and the netting (cage) around the trampoline. I wouldn't get one without either. My neighbor has one with a net, but the coils are exposed, and I don't like it. My kids have jumped on theirs before too, and so far we are without injuries.
My other neighbor across the street had a busted one, they got rid of it, and she told me her new insurance would not insure with a trampoline. OUrs does though, we have Allstate, don't know if this is something new and we are grandfathered in or if Allstate insures regardless. Couldn't tell ya.
In my opinion, it has been a good investment for us. We have ours sitting on rocks in the corner of the yard so we don't ever have to move it around as previous poster mentioned.