exactly. if you keep the scroll ball clean - then it won't fail. however i have cleaned used Mighty Mouse's and re-enabled scrolling on 2, and re enabled everything except for downward scrolling on another.
i think it is very sleek. i love the expose and dashboard shortcuts on the mouse. i absolutely love everything about it. i do wish that you could open it to clean the scroll ball (i haven't had a problem, but i bet it would be nice to blow with compressed air from the inside out) and for less fragile scrolling parts.
besides for the troubles i have seen - mine has treated me great, i'm on year 3!
no problems what-so-ever with right click detection, and for a while i was a single click fanboy 🙂
just got tired of control+click after about a year - especially after living at my girlfriends and getting used to the dashboard+right click buttons...