AMEX screwed up my account by debiting my account with four of someone else's balance transfers totaling over $12, 000. This happened. They refused to help me and correct their mistake until I threatened to sue them. They aggravated me so badly with their extremely poor customer service, that I created a website containing a detailed account of my experience. I hope others read what AMEX put me through and think again before opening an account with American Express, or cancel an existing account before AMEX screws them... read full review »