So, I bought the GMMK Pro, but I really knew the flaws that they supposedly had. So, when I had the opportunity to purchase it for 99 dollars I thought it would be worth it. However, in order to make this keyboard really work, unfortunately you really need to buy and install the FlexKit and replace those really awful stabilizers. Which, I don't know where in the production lineup this originally came from, were really bad. (They don't really do their job at all) In this particular case, I basically ended up using just the PCB. I bought the Flex kit, the Navy Blue top frame, the Polycarbonate plate and the Navy Blue knob for it. Once that was done, it was a completely different keyboard. I was able to get a better sound out of the Monsgeek M2 and the Keychron Q5 (different profiles, but still valid comparisons for me). Also this left me with a nearly complete keyboard, but without a PCB. You need to order the Flex Kit to really make the gasket mount shine and that's an additional 70 dollars on top of the 170 dollars the keyboard costs (retail). I don't know that I would recommend it. I like it after all my mods, but I can't help but think that I could've gotten something better for cheaper.
You can see the picture below with the Akko Ocean Star keycaps. (Very nice and really help with more of a thocky sound, if you're in to that)