Alison pretty much covered it all, really well. The Omnipod connection to the body is very stable, it just may not be stable for every body, and will definitely be less stable if you are not willing to follow a few basic guidelines when putting one on.
I haven't had an occlusion in months. I haven't lost a pod, for any reason, in months. That, of course, doesn't mean that you won't have an occlusion or lose a pod for some reason if you try out an Omnipod, but I can't speak to the problems you will have on other pumps other than to say that, at some point, you will have some kind of issue to deal with.