Last season after I got my sleeveless suit I started wearing it for everything (unless it's way too warm). The arms are usually where I have trouble getting the suit off, and I've found this one is not too bad to remove. I did several sprints and a couple of Olympic distance races with it (one at 55 degrees, my torso was warm but my arms not so much ).

The extra buoyancy helps me get up and over the water and maintain a strong core and kick for the entire swim. I don't know how far I could get down my transition times without it, though, that is something I am still considering. I try to build it into a flow - reach down to take off suit, toss suit away from running shoes so they don't get drenched (or drape suit next to bike), put on shoes, grab and put on helmet, grab bike, go.