I'm not sure I'll sign up, to be honest. I was on zip.ca for a while, but got sick of feeling compelled to watch whatever DVD they chose to send me. And with the 60 GB of monthly bandwidth that Rogers enforces, the streaming would kill my internet bill.
Add to this the fact that there's a kickass local rental place just around the corner from where I live, and it doesn't make sense for me.
On top of all the things Temis
mentioned, you can set the video quality so that it takes up 1/4 of the bandwidth it would at high resolution, and it still looks good. Their compression rate is excellent.