Yes, go, it's huge! I only go about once a year as I'm on the far side of SF, and with the bridge and all it takes an hour to get there, and an hour to get back, plus the bridge toll, so it's usually just cheaper and easier to order from sb.com
They also have a 20% of EVERYTHING sale in about June, check out the website and blog to find the date.
I enjoyed myself at the store. They were very friendly and helpful. The lady told me that more guys needs to get involved with scrapbooking. I walked out of the store spending a bit of money, but that was my goal anyway, so I was ok with that. Now I just need to get cracking on the pages.