I opened an account with American Express after Capital One had refused further credit limit increases on my account. The process was easy enough, and I got my new credit card in the mail not long after I signed up. The credit limit is much higher than Capital One's paltry offering too, so I am actually able to use the credit card to a reasonable extent *without* my credit score dropping like a stone due to ivory tower credit brokers seeing me as a DEFCON 1 risk for "overusing" my credit limit.I personally don't have any complaints about them so far. Hopefully, it will stay that way.
