I have an American Premium Lager entered. It is a good way to get reasonable feedback, but don't expect consistancy in judging, IMO.
And never sell your brew short. I entered this years March in Montreal contest
and got an honorable mention for a ale that I knew was flawed when I sent it in.
This time I do have a CPF so my brew should fare better than my last effort given the chance of oxydation is slight.