Very smooth, makes the xtra more consistent. Dont have to worry about cold weather freezing up CO2 when i have N2 and the regulator. It is the same company that makes the Viking and Excalibur so you know it will be top quality.
None, maybe a little on the expensive side but it's worth it !!!
This regulator is as good as a Palmer but the sidewinder is easier to get. I live in Canada and its hard to get a Palmer.