at Maya's age, i would definately go for the bamboo inserts

leaks can happen for a variety of reasons
- buildup of washing detergent (esp in 2nd hand MCN) which requires a strip wash
- bad fit e.g gaping around legs
- not enough absorbent material
- bad fit e.g wing droop

my DD has a narrow crotch, would took me over a year to work out, that there are actually NARROW and WIDE crotched nappies on the market, and that by using NARROW crotch nappies, NOW the nappies fit her. I was putting WIDE crotched nappies on her and thinking "this doesn't look or seem right" but coudln't think what was the problem (well not for a year - the newborn year).

we were using six layers of bamboo by about eight months old (for absorbency layers in each nappy).

THE SB Econappi is a wide crotched OSFA
The normal Swaddlebees pockets are a sized nappy, and narrow crotched. (also come in the organic velour inner option).