Blackberries aren't bad, as said you get a good 7 days use out of them before they need a full charge, circa 15 days standby.
To use they're no worse than a normal phone, certainly a better UI than Motorola/Samsung, and almost on par with SE/Nokia IMO.
Lots of good software for them too, but have to admit after all that it wouldn't be my first 'natural' choice.
iPhone on the other hand I love, despite it's somewhat mediocre battery life.