I replaced regular, non-locking Grover tuners on my Fernandes Ravelle Deluxe with these. These ain't my first set of locking tuners and I have to admit, I'm really impressed!
First of all, the tuners have 18:1 ratio (as advertised by Planet Waves) which helps you tune up to pitch precisely. The tuners feel very smooth when tuning and are very lightweight - lighter than grovers that were installed on my guitar previously.
The string cutting mechanism, in my opinion, is one the greatest innovations in guitar gear history! It makes string changes so much faster and end results are much better looking that using pliers to cut the excess string off.
The very first time I changed strings with these tuners on, I lost 1st and 2nd string. When tuning up to pitch, both slipped out of tuners and were done. The strings couldn't be restrung, as there was no excess string left to thread through the tuner.
** Here's an important tip! **
Once you have locked your strings in place, start turning the string and after about a full turn, the excess string will be cut off. After that, lock the string in place once again before tuning to pitch! This should save your unwound strings from slipping out.
Overall, I am very happy with the purchase and I would by these again, without a doubt!