I own a GK64, a few notes for anyone considering it:
Pros:
I love the key layout
It's a fairly heavy board (in the aluminum case). I find this to be a pro but others may not.
Hotswappable
Cons:
Not "true" usb-c. Only connects to USB-A, will not connect to other usb-c devices such as new MacBooks.
The software is garbage. Very unintuitive and difficult to use, and only available for Windows.
2u left shift. If you want new keys and don't want to shell out for a GMK set you may have a hard time with this one.
I gave my GK64 to my girlfriend who wanted a mechanical keyboard and didn't care about the specifics, bought myself a DZ60 and am much happier for it.
lifeonadkleinMost older GMK sets don't have a 2U shift either. I currently own 9009 which does and Honeywell that doesn't. I checked online and a lot of other GMK sets don't support it either. Having said that, I don't really understand the price of this, it's cheaper at the all-known chinese website afaik.
MakamiThe one I bought a few months ago doesn't have stabs for the left shift. It was very wobbly until I put a box brown switch in it. With the box switch, it doesn't wobble at all.
Also, a standard numpad 2u "0" key works in that location if you can't find a 2u left shift, though it will probably be the wrong color (alphas vs mods) if you are using it from the same keyset.
Pros: I love the key layout
It's a fairly heavy board (in the aluminum case). I find this to be a pro but others may not.
Hotswappable
Cons: Not "true" usb-c. Only connects to USB-A, will not connect to other usb-c devices such as new MacBooks.
The software is garbage. Very unintuitive and difficult to use, and only available for Windows.
2u left shift. If you want new keys and don't want to shell out for a GMK set you may have a hard time with this one.
I gave my GK64 to my girlfriend who wanted a mechanical keyboard and didn't care about the specifics, bought myself a DZ60 and am much happier for it.