it's a lot more comprehensive than system restore. It makes a snapshot of the whole C partition, and restores it to a previous state. And it is really fast and really convenient, much more so than imaging software. I know because I tried it out, but I uninstalled when I heard about the TRIM problem.
But manually running trim won't work. If it blocks trim, which it reportedly does for a lot of people, then even manual trim won't work on a system that is operating inside the Rollback environment. That's what the folks say on Malwaretips and Wilders. There is a lot of discussion about the trim issue over there.