Using a capo on electric is easy IF the capo is properly adjustable.
The Shubb is a nice capo, but it requires that you set the force BEFORE you attach it to the neck - you must adjust the thumbscrew first. This makes fine tuning the force difficult.
My hands-down favorite on both acoustic and electric is the
Victor capo now produced by Dunlop, though both of mine are pre-Dunlop versions. It is a simple "C clamp" that is 100% adjustable while in place on the neck.
To use it on an electric, just put it on and adjust the thumbscrew until it is just tight enough to fret cleanly. You will stay in tune, works like charm. I use these all the time on Tele and Strat with regular 10 gauge strings and never have to retune.
Capos provide a really nice musical effect that you just can't get any other way.