Firmware update allows extensive customization of buttons. Frankly without it the NEX would be sunk to a serious shooter. With it, it rocks. For example when I pop on an M mount lens the lower button becomes a quick efficient manual assist button, then if I put on , say, the NEX zoom lens, that same button becomes whatever else I deem it, like ISO mode. Central button can be customized for up to 3 different quick get to's, like White balance, B/W, etc. Pretty cool.
I love the fit and handling of the NEX but I suspect it is not for everyone. If you buy one off the internet make sure they have a decent return policy (Adorama, Amazon, BH) so you can try it out.
