I initially considered them when buying my car but running the car without side screens I didn't find it too breezy. The deflectors do look to be a pain with opening of the doors with the side screens fitted so one of those things I'm glad I didn't fit.
Just got to get around to fitting my Aeroscreens now Ken....... Still working out the best way to fit them and a neat solution to the heated windscreen wiring connector......which has been a problem.