I have had 2 ocean swims in this Propel Open Water Wetsuit so far, about 1 km each time. The suit feels great overall. I can move my arms without feeling constrained around the shoulders (only 2 mm' thickness around the shoulders). The suit glides smoothly through the water and lifts my legs nicely without being overwhelming. I have been ocean swimming for years but never did big distances as I'm more interested in general fitness than racing. Being 180 cm tall and about 63 kg (so fairly skinny for my height), I was in doubt about which size to go for initially as other reviewers noted the suit sized on the small side . I eventually picked size ST (Small Tall), which turned out pretty tight indeed but good once in the water. When I tried the suit at home, in a warm environment, it was a real struggle to get into it and it took forever to put on. At the beach, however, things went much faster and I was able to slip on the wetsuit in 3 or 4 minutes. It feels like a second skin when I have it on, which is how it's supposed to be to minimize drag and water entry, and maximize heat retention. So overall very happy with my purchase.