I've had Rogers cable in a number of cities now (always included in the rent, since I find cable a waste of money on the whole). While it's not outright awful, I can't really recommend it. I had a non-digital box that would occasionally decide to stop working, and there were times where certain channels (only the one I happened to be watching, incidentally) would pixellate and almost cut out.
In another apartment, I was using their HD-digital box, which was better, but still a real pain to get set up. There were a lot of identical channels (so they could fill it up to 999, presumably), and the numbering of the HD channels had no relation to their SD counterparts, making it hard to track them down.