They don't fall of the driver as easy and are much harder to strip the heads on. Sometimes you can get away with a hex wrench if they aren't too tight. There are some other variations of this screw out there though, including 5,7 and 8 (uses a square driver) point types and the security type with the center pin. Torx plus can be removed with standard torx tools but torx plus tools do not work in standard torx screws.
Jeep, GM, and many others have used them over the years, it's a good investment to get a set of the screwdrivers and a set of the socket bits if you work on your own stuff much, you will run into them frequently.