I bought the Primo SL closed back and recently wore it at the State Sr. Olympics competition, yes I am a 70+ swimmer. This was the first time wearing the suit. I found it pretty comfortable in and out of the water. I had full range of motion when I swam Back, Free and Breaststroke. Even had a couple of Personal bests in free and breaststroke.
My previous suit was an Arena ST in a size 30, I bought the Primo in the same size. The first time I put it on it took over 30 minutes. Over the past couple of months I practiced putting the suit on using Slick Skin spray. It definitely helps getting the suit over the hips and bum. I can now get the suit on in under 10 minutes. Hurrah!
My only complaint is the shoulder straps do press in a bit more than I like thus the 4 stars. Even though the straps are a bit uncomfortable I love the suit. The compression is great, not too much for an older swimmer like myself, even when the suit was wet.