I love my Blackberry to bits.
I have the Blackberry Curve 8330, and I've owned it for a little more than six months and it goes everywhere with me.
I have MSN, email, internet, facebook - pretty much everything you could use on a Blackberry - on it. I don't use it every second of the day, but when I'm not on it, I'm usually on my laptop
The only bad thing is that I broke the screen in two places within the first month.
Its fairly common amoung the people I know who have them. My sister has one, got it before me, and the screen broke. She doesnt remember how, but it's expected. She was most likely drunk at the time
As much as I adore my phone, I want a new one. It might be because I have commitment issues with phones. I've never been able to keep the same phone for over a year. It's rather sad, actually...
I've narrowed down my replacement phones to:
But if you're good at NOT breaking phone, the blackberry is a good choice :) just make sure you get a bundle with internet. i use it a lot more than i thought I would.