FlyerTalk Evangelist
Join Date: Aug 2011
Location: Barcelona, London, on a plane
Programs: BA Silver, TK E+, AA PP, Hyatt Globalist, Marriott LT Plat, Hilton Diamond
Posts: 13,048
Upper Class is a different matter, but Y and PE rewards cost far fewer miles than other airlines charge. So miles + co-pay can work out quite well for infrequent flyers / shoppers, especially those based in the UK.
As for US-based FTers, it's hard for the rest of us to feel much sympathy when you've simply received 100k+ miles from a credit card sign-up that you may or may not have signed up for without really understanding Flying Club...