I'm happy the MD770 has no "software", there's no fuss to using it, or it getting reset, etc. I don't have the RGB model, mine isn't even backlit. The only limitation really is that you can only remap or macro keys you can type on the keyboard itself.
I love my MD770, I've used it about 3 years now. It came with MX Clears but I quickly got tired of them, literally, and swapped them out for Kaihl Royal's. I'm still using the keycaps it came with and while I'd prefer white or maybe some other light blue or such, the orange is fine. Not like I stare at the keyboard.
I did rearrange the nav keys, added a few macros to type some usernames for me, but that's about it. Very happy with this keyboard, it works 100% of the time, no quirks. My other portable keyboards work about 99% of the time, but this one I never think twice about it.
I wish I had replaced the stabs when I was swapping the switches out. They're pretty rattly, which I don't care about most of the time but if I'm doing a bunch of repetitive backspacing, like cleaning up some junk in a document or something, it's a little annoying.