A friend of mine has a Viewsonic that's a couple of years old and he had to have a warranty swap. Anyway, their service department *apologsied* that she couldn't get the pre 9am slot the next day and could only book it for pre 10am...he called about 4 in the afternoon!
A bit of tangent, but Viewsonics aftersales is considered to be about the best there is - and their moniters aren't bad too! :-)
W.