I agree that having my calendar at hand all the time is great.
I'm not sure having my e-mail with me all the time would constitute making my life easier...
The thing I like is the voice quality and reception. I use to have a Motorola V360... nice phone, but I could not get reception at home if my life depended on it. With the BB Pearl.. No problem. unless I'm in the basement, I always get a signal.
And I find the voice quality second to none...