We have them and find the control nice for detail work. However, we too use everything under the sun; knives, dremel, soldering tool with a temp control(dimmer switch), propane torch, jig saw, key saw, files, and generally anything within reach that may serve the purpose. To be honest the tools were an impulse purchase at an event used like a carrot to a horse( wife and daughter).

I always felt that if the cost needs to be justified you dont need it.