Made some chips with kohlrabi yesterday. Not a bad substitute considering the significant reduction in carbs: http://www.carb-counter.org/veg/search/Kohlrabi/1100
Thirsty said:spiral, deep fat friers are a pain in the A. They coat your kitchen with foul-smelling, difficult to remove grease and the oil has to be replaced every time you cook anything tasty, which isn't a pleasant task.
I gave mine away.