The clinic I go to uses a Candela GentleLASE and I think it works well. I have fair skin and at first it didn't leave any marks but now that I've had over 10 treatments, the technician keeps turning the power up and it does leave red marks/welts on my face for a week or so. They just look like pimples or something to everyone else, so it's not a bother.
If you have fair skin and dark hair, you may not even need electrolysis as laser works very well on that kind of skin/hair.