Very suprisingly, i'm loving my coolababy AIO's ATM and reach for them before my BG AIO's and even my pretty Weenotions.
They are soo trim just like a BG AIO but with poppers (bonus). They are supposed to be BTP but fit from 15lb really. DD is in large WN's but still on smallest setting on these, so at least they should last a while.
I've got loads of them (bought in bulk off ebay) if you want to try one