I bought the swim plunge bikini top and matching bottoms about a month ago, and have used them a lot in that month. I tossed up for a while because they were quite expensive, but I am very pleased with my purchase.
The top is the best bikini top I have ever had for lap swimming. It is well structured and strikes the balance well between a fitness and fashion item. In terms of pre-swim exercise, it offers plenty of support for cycling, and is ok for a jog (I'm a D-cup - perhaps it would be better than ok for a run for smaller breasts).
I ordered size 12 in both the top and pants - the size guide measurements are accurate and the fit is perfect. The shape of both pieces is very flattering.
The only downside to this bikini is that it takes a very long time to dry. However, given all its other strengths, I certainly would not be put off by that.