i've just upgraded all my design bods at work to 10.3 - seems pretty good so far but i dont use the OS day to day so couldnt give a fair opinion but they all seem much happier...think they said summit about not having the OS 9 enviroment running has made their systems much faster...
but i have to say i'm well jelous of 'em - makes windoze look pants! kinda wished i bought a MAC for home rather then a PC - MAC seems much more fun to work on ;)