I've been running Rogers' Ultra service for the past couple of years with 75/2 down/up speeds. While the service is impressive I do not like how Rogers has made it so expensive to go over their small download caps.
On a regular basis I'm finding myself paying $100 because I went over my caps. They used to charge a lot less for this and the reality is it's nothing but a money generator for them.
I'm planning to switch to another ISP because of this and will do so soon.
Update: I have switched to TekSavvy's unlimited 28/1 service. It's sad that I've had to cut my speed to 1/3 of what I was getting, but at least I'm going to have a consistent bill every month regardless of how much I use the Internet.