I have used it before just to try one out in a pool dive. It was alright. Takes a little to get used to it. The only thing I had to assemble was adding the mike into the facemask and placing the earpiece on the band. The only thing I didn’t like about the mask was it made me feel clausterphobic. From the looks I think OTS has a better nose clearing piece. For the Ocean Reefs there are two plugs that you have to adjust and its hard to get them right. I tried all different combos for them and none could really help me clear. I would like to find an OTS to try so I could compare them.