I build premium grade professional guitars (Turbocaster Electric Guitars on Facebook), and would not EVER use any other tuners than Hipshot locking.
I also use them on all my personal, working guitars as well.
Aside from them being super high quality, the open gear tuners are COOL!!
Also, the Universal Mounting Plate system (no screws) leaves no holes in the peghead, so on the rare occasion that someone would like to replace them some day, there are no holes to have to fill and attempt to hid...