Hello!
We also have bum genius and they're great!
We have 10 of them and 12 terry squares with motherease wraps, our little one is 4 months and uses about 6 ish a day and a few terry's depending on poos! We tend to use the terry's at home as they only last a couple of hours until soaked, but the Bum genius usually hang on a bit longer.
We add a fleece liner and that seems to work a treat keeping moisture away from his bot, before that we used the disposable liners and they just made him sore! So now have rolls and rolls of them left over!!
Also have just got an amber teething necklace and that seems to be keeping him nice and calm.. not sure if he's actually teething tho!
;D