I have a set of these installed on my project guitar with a double locking tremolo. Most may wonder why use locking tuners on a double locking tremolo? Simple: For easier quicker string changes. Plus these tuners look freakin' sweet! The build quality on these tuners are bar none with silky smooth action in the tuning pegs and locking pins. Besides that the greatest thing is the drill free installation that can be had with most 6 inline necks when installing this with the Universal Mounting Plate. This came in super handy and made the installation a breeze. I'm totally sold on these tuners and recommend them without hesitation!
I got a set of these with staggered posts and the Universal Mounting Plate for my MIM Strat several of months ago. Very solid good looking tuners, just a few minutes to install, and the locks are invaluable for quick and simple string changes. This would be a five star review except for the claim that staggered posts make string trees redundant. After installing the tuners and removing my string tree, my high E started popping out - not because of any extreme picking or bending or popping or windmilling, just ordinary slightly fast strumming with the high E open. The nut didn't appear to be the problem, so I replaced the string tree and all was good again. No complaint about the tuners themselves - love em.