Disclaimer: I am a breaststroker and have worn many different suits and suit brands including Speedo, TYR, Finis, A3, Arena, and Mizuno. First off, and IMHO, when you are looking for what size to get, don't size down ridiculously. If this is your first time wearing Mizuno, take the time to measure your hips and waist as accurately as possible. I sized down on my last suit and it ripped. That being said, I wore this suit to my champ meet this past weekend and I love it! I have worn the GIII ST and now the GIV MR and this suit by far feels the best. Flexibility is a tiny bit of an issue when bending over or executing an open turn, but that might have just been my personal apprehension after my ST ripped doing a squat jump before a race - again, get the right size. The suit dries quickly, fits tightly around the hips (high waisted on my body type which I didn't mind). The only thing that bothers me is it's a little loose around the leg hole and I wish the suit itself was a tiny bit shorter. In summary, I highly recommend this suit - ST or MR. As a breaststroker who has swum in both, I personally recommend the MR.