I live in the OC and go every year. Very worthwhile if you're serious about the hobby.
If you're looking for quality, go Saturday - early. For the bargains, go Sunday afternoon...
Pomona was a bit of a letdown this year. Understandable because of our economic condition. They did have some trophy specimen that were $$$$$$
I'll be there Saturday for sure and depending on the weather, Sunday.
I always swing by MCRD to see how the new recruites are doing...