Goldpoints: in terms of the highest error rate per transaction, backed up with abhorrent customer service. However, I’m not really familiar with any other portals (I have never had a paid stay in a Raddison, and only use them as a engine to purchase stuff), so perhaps GP is par for the portal course.

I’ve no huge complaints with LatinPass, although it was a heckofalotta work to use the miles, especially as they required a fax (not email) every month to do that 30k transfer to Marriott, then after Marriott dropped off, Hilton. LP was useful to snag a bunch of South/Central tix to places that I might not have otherwise traveled.

Of the big three (Marriott, Starwood and Hilton), Marriott seems the most problematic, hence all my stays now go to *wood and Hilton.

Finally, I think that Southwest fills a nice niche, but clearly they are not trying to attract hardcore frequent flyers, and people who use 'em (i.e. my mother in law, seem to love the flexibility). True Blue (Jet Blue) is the best named FF program, but the one that seems to me to have the most minimal benefits.