I had a RS-130 and it froze up 2 weekends in a row I traded it for a RS-230 that more or lesstook care of the freezing but i would not rate either of them higher than fair .wlo93 once bubbled...
Cold water performance could be an issue, as that is something that might be a factor, as am not doing most of my diving down south. I was in a LDS just yesterday and they were pretty high on the Mares regs.
Joens