I use them (as well as Mage Knight figures) regularly for many games: Strange Aeons, Spinespur, Rippers, Necromunda, etc.
If you're planning on rebasing them, the trick in removing them from their clicky bases is finding the "sweet spot" - I've found that most of them have one. It's a spot where the model is less firmly mounted to the base. I usually find it by testing the edges of the join with the blade of a large Xacto knife (the kind with a retractable blade, similar to a utility knife) until I find the spot where the blade slips easily between the model and the base. Then it's usually just a matter of pushing the blade into the join a little farther and rotating it; the model usually pops easily off the base at that point. (Of course, there are a few that don't have said sweet spot, and those that don't "pop" when the blade's turned. These are the ones that usually involve cursing - and bleeding, if you're too aggressive or careless.)
