Mark
First off, the purchasing, storing, and payment services are easy as pie for me, which I really appreciate. Second, and most important for me, I like asking questions (probably too much) so whenever I have a question not only does SB answer them promptly, but their answers are descriptive, thoughtful, and very easy to follow. So, if you are a person like me who likes good service and you especially like to ask questions and have them answered, SB is second to none.