I was VERY impressed with the results!
I don't have exactly the right cable, so on my TV in Montreal the output is black & white. I tested it in Saskatoon on my roommate's TV and it worked in colour. Apparently it is missing on a few similar models they made in the states.
It's a neat feature - basically any time you want to show more than one person something on your phone (pictures, a YouTube video, etc), you can just plug your phone into the TV with a $1 cable.
Landscape mode fills the screen.