I originally joined IDNET after reviews on this page showed them to be a reliable provider with great customer support, although not the cheapest. My ISP prior to them were cheap, but went bust, so no shocks there.
After a few months of trouble free use, my last 3 weeks have been terrible, but due to no fault of IDNET. Despite BT saying otherwise, I knew there were line problems, having tested and changed various pieces of my own equipment. IDNET proved themselves during all this to show fantastic customer support, even out of normal hours, when their rep never failed to contact me and deal with any query or problem. Highly recommended.