I have switched my cable to WOW from Time Warner. So far the cable modem ROCKS. I get 6.7MB/sec download and 1.2MB/sec Upload, from Speakeasy Chicago.
I have an older HDBox and they don't have On-Demand yet, but I hear they will have it in early December. The cool thing is I get ABC and Fox in HD. TW does not have them because they are stubborn.
If you want to join WOW on me, I will send you a $10 gift card from Amazon.