I've used several generations of Craftsman clickers (but not the most recent,) and they were terrible at maintaining calibration. I wouldn't trust them nearly as far as I would throw them. Maybe if you calibrated them before each use, but then you'd need a calibrator (expensive itself.) Not worth it.
Hi -
I change 48 tires per year (6 cars, snows on/off fall/spring). Used to use an impact driver, but it was hot, heavy, and gave me blisters. Now I use a breaker bar, and set with a torque wrench. Once you get used to a breaker bar, you can skip the torque wrench when you get used to what the correct torque feels like (assuming your car(s) require the same torque.
For the RV, I also have a 4' 3/4" drive torque wrench, as lugs have to be torqued to 450 ft/lb, and the re-torqued after the first 100km or so. Every season I check the torque of the tow plates etc on the car I tow too.
Important to do!
Cheers -
Rob