Having been a Wanadoo customer (now Orange) for years, I found out I was paying £17.99 a month for a Broadband service that was quite inferior to most others out there. I was lucky if I managed 1 meg.
So, I called Mumbai's finest and had a whinge and lo and behold someone called me from Middlesborough not 10 minutes after I hung from my previous call offering me a faster service (now 5 Meg), a free wireless box, one months free subscription and a reduced monthly payment. However, as I was an existing customer, I had to agree to another 12 months with Orange.
What I can say is that my Broadband is considerably faster, downloads are quicker and it's quicker to navigate between sites, so I'm happy. If you transfer from one ISP to another you may be able to negotiate a better deal.