The purchase protection/warranty is nice. And Amex DOES have their actual credit cards - which is the whole reason I have my Zync, so that I can try to get a BCP/BCE later this year.

Other than that? I guess it's the percieved status from it. The only time I've noticed that is when I went out drinking with friends last weekend and used my Amex card at the bar, the bartenders seemed more polite and quicker to get my drinks than they were with my friends who used cash or whatever cards they had. Of course, I could rack it up to my charming personality and good looks, but I doubt having a "better" card hurt either