I've cloth diapered for quite a while now, and I've seen lots of reactions to different diapers. I have not tried Kushies myself, but here is what I've found.
For people that have only tried Kushies, they like them just fine. However, for people that have tried all the other cloth diapers out there, they hate Kushies. Does that make sense? They're ok unless you know of the better ones. I think the quality of Bum Genius and Fuzzi Bunz is far superior to Kushies.
Bumgenius are awesome diapers, though. I've not known many people who haven't liked them. They have other products (the Flip and Econobum) that are more about economy, but the Bumgenius one size pocket diapers are AWESOME!
***ETA The other posters have valid concerns. The velcro DOES wear out faster, but Cloth Babies replaced mine. Also, I have the Bumgenius one size organic all in ones, and they have snaps. I LOVE them! The snap placement is perfect. We have Fuzzi Bunz, too, but I actually find THEM to leak more often, and I don't get as trim a fit. We use Happy Heiney's as well, which I also like (though their snap version I don't like as much, their velcro lasts a long long time).
We used prefolds and covers for the first 2 months also, because they can be folded to fit a newborn better AND they're more affordable when you're changing your baby every hour! I had 36 and was so glad I had them all, though I did laundry every day when he was a newborn, with two in diapers. I'd recommend at least 18 (to wash every day) or 36 (every other day). Prefolds are a wonderful system!