Ive just started using them, they are a bit on the large side for him yet but so far Ive used three and they are one of the best with regards absorbing and holding pee, Ive actually switched out some of the inserts from other pocket nappies to use the OneLife boosters.
They dry super fast too which is nice, just chuck them on a rack next to the radiator and they are dry in a few hours.
Im going to do a proper review on them once Ive managed to get a poop in one but so far they are my favorite 2 part system...especially as I only spent £40 on 19 nappies with boosters, fleece liners and wraps (though I dont like their wraps that much)