Looks dubious to me.
The description for nearly every other ISP has a reference to how they are "not nearly in the same league" as Home Call, and they list the same company (Telewest Broadband = Blueyonder) twice at the end. They dont even provide links to the other sites - even though they peddle BT and Homecall purchase pages often enough at the top
You'd be better off checking adlsguide as Evo says, for decent impartiality.