Having had this keyboard for a little over a month I think it is a mixed pleasure. Userinterface: very good, sounds: good, key action: BAD.
In the beginning all was good, but rapidly one key started to make a loud mechanical “clunk” noise. Now other keys are also showing signs of that. If you only use the keyboard in a band, I think you will not notice it, but if you also use it for practicing in a more quiet environment I think you will be extremely annoyed - at least I am. It sounds and feels like a cheap toy keyboard.
Thomann has kindly offered to replace the keyboard, but a search on the internet for problems with the Yamaha GHS key action reveals lots of reported problems with “clunky” noise. There are even videos on how to grease it yourself. I do not want to do that.
I really don't know what to do with this keyboard. I fear that replacing it now will only be a temporary fix and that it will be a never ending story with noisy keys popping up.