Maybe 15 years ago, a guy I was working with bragged about the insanely cheap Biz fares that he was getting to Asia using one of these (saving something like $1-2k each time) I warned him, but he used them TWICE and swore by them. Sure enough, the third time he called me up from Beijing telling me that he was stuck at the airport as the airline had cancelled his ticket, and that the cheapest ticket that he could get back that day was going to cost him something ridiculous like $8k, and asking me for advice. My response..........I gave you my advice six months ago.