One machine head got broken on my Schecter Stliletto Studio 5 bass, so I ended up buying a complete set of 5 machines and replaced all, now I have 5 new machines and got the rest functional 4 machines as backup replacements.
Kluson tuning machines are great, keep the tuning well, and precise enough. I can't tell about durability, as just installed them a month ago, but it seems they should last, because my old machines lasted about a decade.
Seems like a great price/quality ratio.
Shipping was pretty fast, took one week to arrive from Germany to Croatia.