I bought these tuners to replace a Gotoh set that was originally on one of my archtops. The reason was to add weight/mass to the headstock to improve the sound of the instrument.
As far as I know, Grovers are the heaviest tuners on the market and installing them did the trick.
Tuners, i.e. their weight, can have quite a dramatic effect on the sound of a guitar. Some guitars need more weight to sound their best, some need less. Weight reduction can also be accomplished by using wooden or plastic tuning buttons.
So, apart from featuring standard quality and tuning stability, Grover tuners are the ticket in case you want to add mass to your headstock to improve the tone of your guitar.