The comics are bountiful if you're looking for old ones, the food is amazing despite the fact that its a tad expensive, the people there are extremely nice and are willing to work with you. I've been to Bo's several times for yugioh tournaments (Sundays at 2 p.m.) and have never been disappointed at the service and laid back atmosphere. They allow you to trade in cards for packs and yes they will give you less than you would get on ebay but its not horrible and understand that it's a business and in order for a business to succeed, profits must be made.
This place is a must go to if you live/work close by Westheimer. Just be forewarned that during the lunch hours, a long line can develop fast. Make sure to get there extra early!
clean establishment. fast friendly service. personable staff. the cream cheese kolache was one of the best I have ever eaten.