Great marketing. Inferior products.
I run a guitar repair and electronics custom shop. My experience is limited to customer guitars with Guyker hardware that they installed. Guyker tuners, in particular, are among the worst I've experienced for quality. Tuner gears slipped, only to start turning again later in the rotation. I don't care what name is on tuners, whether they're locking or not, or how much you paid for the "upgrade". If Guyker quality goes up, I'll give them another chance. So far, what I see is poor quality and a massive marketing effort claiming to be experts in the field of guitar hardware. A lot of the hardware has a familiar look. It's obvious that this company sources parts from various factories that can slap the Guyker logo on them. It's up to Guyker to enforce some from of quality control. I'll be waiting in the wings, watching for quality improvements and watching the tuning woes of others.