I took some out-of town friends down to the Market (who doesn't?) and we happened to pop into the Truffle Cafe. Our staff member was AMAZING. He explained far too much about truffles, cooking, wines, and even vinegars (who knew there was so much to learn?) and accommodated us for over an hour with patience and enthusiasm. What an amazing experience.
It's far too rare that you find a place with a great product line and such a great staff. This place is a genuine treat in a very touristy area. There are plenty of samples--wines, bread, truffle oils, soups, etc. and and wealth of information to be shared here.
Pros: Products, Service, Quality