Runs very large
This harness runs VERY large. I ordered a S after measuring myself and consulting the size chart, then had to exchange it for an XS. Even with the XS, I don't always feel secure even though I've tightened it as far as it can go. I can still fit about a fist in between my belly and the harness once it's there.
As for the black elastic bits, they're VERY hard to adjust. Plan on spending a long time getting them just right.
Then when you've got it ready to go? The flared shape of the whole structure leads to a lot of riding up.
All in all, this harness is lightweight, but I felt a lot more secure and comfortable with the rental harnesses in the gym.