I bought all in ones and to save money in the long run I got one size fits most. I find the bonnibuns workhorse incredibly reliable, affordable and more of an AI2 style AIO. Abby Gro ROCK as well! My cousin got me on to both of those and I haven't looked back. Both very user friendly and straight forward and don't have to upgrade as bubs grows. I use Cushie Tushies too but they aren't my favourite performance wise compared to the other 2 brands i frequent.

Another thing is the bonnbuns Night nappy is Charlotte wee proof. That baby can out wet a huggies sposie in 3 hours while sleeping but wakes up dry as anything.......