Hi. I completed all classes in WSET at certificate and diploma levels. Right now I am in the thick of completing 3 more exams and 3 more papers so I hope to say in one year from now that I am finished. I have been completing all of this at International Wine Center in NYC, the WSET NYC brance the articles discuss.
It is true that their program focus leans more toward the wine business rather than restaurants. For example, they never get into discussions about food and wine pairings.
As per its legitimacy, all of their exams are administered by British examiners. They mail the exams to the IWC to administer, and then after we take these exams, IWC mails the exams back to England to be graded there. THe lecturers we had were a combination of various wine professionals, all of whom have WSET diploma. None of these teachers "teach to the test" since they do not get to see the test before hand.
To that end, I hope that WSET still remains legitimate as I put a great deal of time and effort. So long as I receive the piece of paper I expect to earn, I am good. I would imagine that since the exams are given by the British and graded there, that the program is going to remain well respected in the world of wine.