D.W.
I have a thirsties duo cover with snaps and it is great to use. You can adjust the rise and width. The snaps don't dig into baby or anything. The duo pocket diaper is their alternative to the aio that they discontinued. Probably basically the same since the aio had a pocket as well.
I also really like BumGenius. If I had it to do over I would have bought all one size pocket diapers because I like being able to adjust the absorbency. And it's more economical to go with a one size option.