I've used greenkids and bum genius as pockets on ds1 without problems but I did use bamboo boosters and made sure they did reach the top at the front. The bum g ones that snapped down, I put the extra bit at the front do there was an extra part layer at the front. I also used a small booster inside the double layer insert for the GKs so I had 3 layers of thick bamboo.

I switched to itti bitti SIO with DS1 as I got tired of stuffing pockets. DS2 has only used ittis happily with no dramas and disposables (we part time cloth due to childcare and a sposie works better for us at night). Main thing is to make sure it points down