Judging from the postings I've seen here, AMEX is great with customer care, and does offer some genuinely rewarding rewards programs. However, they're also rather skittish and paranoid, reducing credit lines and giving the dreaded financial review at the drop of a hat...or sometimes, with no clear reason at all. Kind of like a cat I have, that purrs and sits comfortably in your lap, rubbing up against your legs...and then, moments later, decides to use your back as a scratching-post.
I suppose it all depends on your perspective...if you use the card enough to actually benefit from the rewards, and you like piping large amounts of money through your credit-card account to rack up bonuses, then AMEX can be a good deal. If, on the other hand, you're just looking to build your FICO score and have access to moderate credit lines, there are far less skittish beasts to use for that burden.
