Yes, I use mine for fries, courgette or celariac. Also made fried chicken, but used a shallower pan rather than full immersion. I know Atkins book advises to avoid deep fry, but I've had no problems thus far.
Ok cool I'm gonna get down a stone and then give it a go just incase it stalls me, I don't think I'd use it all the time maybe 1/2 a week and think the key would be in the oil or with the fryer itself!
Ill keep you posted