It's slow, that much I can tell you. And I think it's like 7 different points you go through as well(might be random, been forever since I've used tor)
It's not that bad if you need to be anonymous. There's some fun things on the deepweb. Not much point if you're using it just for basic browsing. I'm fairly sure that it uses 7 different proxies around the world. I tested it, and it said I lived in Denmark for a bit.
The very latest Tor bundle works a lot faster than earlier ones. https://www.torproject.org/projects/torbrowser.html.en
Very useful if you go around the net and want real anonymity, but like Perkomate says, for basic browsing it's overkill.