Just chiming in to say RK actually makes nice budget mechanical keyboards. My fiancee has this model and loves it. I have an rk 68 wired and an rk71 triple mode and like both a lot.
I have been researching Bluetooth keyboards for a few months and the reviews for their keyboards are 99% positive. The typing experience is very good and seems like the software has a lot of features if you like creating shortcuts and such.
I’m looking at the RGB version of this on Amazon, which can be had for only $10 more right now. $60 and then apply the $5 coupon. It’s the blue light only on this one that keeps me from buying it. I have to wear computer glasses to avoid blue light eye strain. Even a white backlight would be better for my eyes. They put white on the folding keyboard but not this one.