I had valet key with my Mk2, but not with current Mk4, which is why I fixed the keys.
My first attempt at fixing was cr*p, and lasted about 6 weeks, so my version 2 of fix was better thought out.
I would say that if i charged myself say £15 per hour to fix, it would have been cheaper to go to Lexus and buy a key at their prices, but I love a challenge.