I have one and I boost it with ep hemp and/or some bamboo and it's a 2-hour max nappy (usually something to wear between dinner and bath.) I do like the fit, though, and that it's quite trim, even with the boosting.
We love them, especially the SS. The large fits dawn on the 3rd tighest snaps, so lots of room, and they kinda fit her like a pair of undies would. No bulk at all. She doesnt wet often, but is quite heavy when she does, so can't really comment on the absorbancy, as ours can last like 3 hours then be flooded in seconds because she just 'goes'