It's the RBS one I have - it doesn't work out for domestics (much like using expedia et al is rarely cheaper for domestics) or short haul. Haven't had to buy a paid BA long-haul for a while, but I have saved money booking on VS in PE.
And the ability to call up and chose your fare class is pretty useful too - if I can't book online, then i might as well use a TA giving me a discount!