When I lived in Napa I really enjoyed going there. The overall experience is hard to beat. The rock quality is generally very good, and the views are breathtaking. There is a decent uphill approach, but it's in a beautiful setting.
The rock is an odd volcanic mix, and there are a lot of pockets and inlayed pebbles. Most of it is sport, but there are a few trad climbs with good jamming as well. A lot of the 5.10-11 sport routes are steep and juggy.
There are a few two pitch routes on the Bear, and they are really fun. However, they are not beginner and stiff 5.9 minimum. There are some easier routes (all single pitch) near the bubble and far side.