I had the opportunity to buy this unit and use it at deco depths. I spend a month diving in Palau, Yap, Truk & Bikini Atoll. This unit worked flawlessly with ease of breathing at 186' on the San Francisco Maru in Truk to the 2 a day 175' dives in Bikini Atoll. I highly recomend this regulator and its companion SS1. I purchased the sealed kit for this regulator. Jim Knieling 600+dives