I have been disappointed in general with SC at SFO, SAN, MSP (both), and especially SLC. How can the SC at their hubs be this mediocre? They are usually crowded, poorly laid out, and the chairs are uncomfortable. Not to mention the food is pathetic.
I was very impressed with the SC at SEA. The food options were limited, but what they had was good. Fresh potato chips and clam chowder from one of the local restaurants (forget the name, Anthony's? but they have a restaurant at the airport in the main terminal too). The space is very large as well, and has a nice 30' tall wall of glass that you can watch the tarmac through.
The SC in AUS just opened a few weeks ago. I just had a few minutes to walk in, use the restroom and leave. I will be there again this week and plan to arrive at the airport early enough to spend some time there and check it out.