I have been with free-online for years. I started with dial up and have been on broadband for 2 years. Always had the best of service and their telephone helpline was great when I switched to broadband. No rip off costs for calling them.
They recently upgraded my bandwidth to 2MB at no cost and they seem to keep prices competative. I've actually seen prices come down!
Very happy and would recommend them.
You don't have to have free-online in your email address. IDPS also works (so you don't look a cheap skate.