I've been with Start since July for cable and I've had zero issues since I signed up, I've had a few questions that I had to call tech support for and the wait time was at most 1 minute each time I called. The staff were friendly, courteous and knowledgeable, they were able to answer my question immediately.
My connection has been rock solid since I signed up for it and there have been no slowdowns. I have the Standard Cable Internet plan, 18Mbps download and 512Kbps upload.
Toronto Nexicom: »www.speedtest.net/result/2434233 ··· 3842.png
Montreal Fibrenoire: »www.speedtest.net/result/2434235 ··· 5810.png
You can see my review of Start here http://www.dslreports.com/comment/86431, I included some speed test in the review as well.