Sometimes it's nice to have a couple of classes especially if different judges. If you don't do well under one judge, the other might like him more.
The downside is most AV classes are at the very end of the show and cockers might of been first in so you end up sat around a long time and by the time the class is called, both you and the dog are fed up.
We have quite often entered the AV/Stakes classes but if we're had enough, don't always stay. It's often only an extra £1 so nothing much to loose if you don't bother to wait.