Wirelessly posted (8700g: BlackBerry8700/4.2.1 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/100)
It depends on one's expectations. The bb browser is a mobile browser. It doesn't display a site the way it would necessarily appear on a desktop/laptop, and some sites will take forever to load, or not load at all. But, more and more sites are providing mobile versions and will even redirect to the mobile page.
And there is opera mini, which many people like and believe does a better job rendering web pages. And there are options such as skweezer and the similar mobilizing features available from other portal/search sites.
If you want full browsing capability with no fuss or muss, you'll be disappointed.