The Skyloong GK75 is a great board. It comes heavily modified already with dampening and lube. The lube job on the switches is done well with only the Enter key being overlubbed. For me the selling point of this board was the modular knob spots on the board. I am left handed and wanted a knob on the left Esc key. I ended up with 3 knobs and they are great. It also comes with a split space bar with split keycaps. I haven't yet switched that out. Works with Windows and Mac with a button on the bottom to switch inbetween.
The only gripe that I have had with is it the software. It is proprietary to work with the knob support. Unfortunately it isn't as intuitive to navigate the software as I would assume. The key assignment has some UX issues with pop up tabs. The what you would think would be the LED menu is greyed out on the one you use, so you have to set it in a different "profile" then choose between those options in your other profiles. You can do your own custom lighting profiles in a different section of the software then go back to the standard profile and apply it. All together it just seems like the UX could be better streamlined.
Overall it is a great board and would be a 5/5 if it wasn't for the software experience. The software isn't unusable, but it does take time to learn and it's not intuitive. Once I got around to navigating it this is my dream board. I didn't find another keyboard to fit my wants.