I upgraded my SG to these Grover tuners, make sure you buy the right size, mine fitted perfectly.
The guitar definitely hold its tune better and these new tuners are easier to tune than the old ones.
They look the part for the SG with nice pegs.
I play indie-heavy Rock stuff so the guitar takes a good bashing string wise, and these tuners hold well, unlike the stock ones.
Ive waited a while before review to give a good review. They still perform as well as the day I installed them.
Overall these look good on the SG, they are nice/smooth to use. I am very happy with these and would buy again if i needed a set for another guitar.