All the shows at the festival for the last 6 years have been amazing. My husband won't let me do anything else for his birthday since I took him in 1999. There are shows every day, and you can get tickets for $30 for folks under 30, or there are lots of discounts for groups, weekday shows, and other matinees.
There are a lot of hotel packages as well that can make this an affordable night away, or if you live in the area, it is a doable day trip. The wineries nearby are a great place to visit for lunch or dinner. There is not a bad seat in the house.