I do use this service and find it very dependable as well as economical. They do not have local dial-up in my area, so I use a toll free number to connect. Without a local dial up, the cost is 2.9 cents per minute
Visit them and see what you think. You can manage your account online and they are compatible with WebTV.
If you decide you would like to try them, I have a secret code for you to use. You will get an extra 20 minutes of credit added to your account if you put the code in proper input on the application form.
Here is the code:
To get your extra 20 minute credit, put this code in the "Promotion/Suite Treat Code" input when you are signing up.