I have a question for the more knowledgeable out there. I am thinking about a pro 100(more continuous) or pro200(more nick). I had several SD models and sent them all back . Their customer service treated me well but I finnally had enough problems and returned my last one for a TT G3 sport combo. I havent even had the g3 on the dog yet but have experimented on myself. I am unsure if I like all the dials to change between different modes. and I would like to have more levels at my fingertips. My dog is thru FF and CC but I am still unsure what I like the best (continuous vs nick) as he seems to respond equally to both. I use the continous button more like a nick but of course cant duplicate tht fast nick as well as the nick button can. I am just looking to see what most of you prefer. As a wise man once told me "buy the best and only cry once."