I have an RM pro 3, an RM mini3 and an RM mini 4, all connected to my c5 hub. They work like clockwork and never miss a beat.
The rmminis can be had for 10-15 dollars, but do read the thread linked above, as if you use the wrong broadlink app to set them up, they can get cloud locked and won't work locally. The rm pros also handle RF devices at 345 &415 mHz IIRC. the minis only do IR