I bought these to fit my epiphone Les Paul Custom Pro replacing the non-locking Griver tuners that it came with. The swap was quick and easy, took me about 10 minutes. They were a bit tarnished and needed a polish and that was largely succesful, just not as good as the originals.
As tuners, they're great, my LP holds its tuning much better than before. Restringing is obviously a lot easier with lockers and I've managed to maintan the overall look of the guitar.