The booking process is as easy as most and accessed prices available from code share partners of US airlines at substantial discounts to the prices shown by the US partner on their website. I save ~$5,000 on a business class ticket to Hong Kong (last year) and Shanghai (this year). Seat selection is slightly harder but OK. Only problem I had is you cannot put in your domestic airline frequent flier number if the ticket is booked with a non-US code share partner - you have to make the reservation then call the non-US airline and have them update the record.