We were in cat. 2 a few years ago and were in the back under the balcony. The theater is small, so we still had a good view of the stage. It did seem a little dark under there when eating, but overall it wasn’t bad. We’d rather sit in cat. 1, but 2 is fine if that’s sold out.
I no longer rush to book category 1.
As PP noted the theater is tiny (take a look at the seating diagram and compare it to photos) and there really are no bad seats. The only problem I have is category 3 isn’t accessible so I tend to book category 2 when available. Category 1 is great for people who hope to be chosen to get on stage by that’s not a want for me.