I deal a lot with Celga, and they have always 
been pleasant, friendly, and helpful.  There was 
one snafu one time (bids not placed), but I lived 
through it, and they were as sincerely upset and 
apologetic as one could possibly expect.  

Depending on what time of day (or night) I send 
up my requests determines who sends me a 
confirmation email, but the whole staff (and 
Keigo) have been uniformly the nicest people to 
deal with.