I sculpt in Magic Sculpt exclusively. Have been for years. I love it. Oddly enough, I have never been a Sculpey fan. I know a gut who does a lot of work for Verlinden who uses Magic Sculpt for everything but the face, and uses Super Sculpey for that. Didn't work too well for me.
You know you can cook off Magic Sculpt too? I made an oven from a small card board box lined with aluminum foil and then stuck a 60 watt light bulb in there. It cooks the putty off in about 10 minutes. Been using the same box for about 10 years now. I bust through faces that way. I sculpted a U-Boat commander bust in one night that way. I don't usually whip through a project like that BTW, but I was on a roll that night.
Very hard on the eyes indeed. Keep up the good work!