Yep. The annual fee for my Platinum Cashback is £25 quid but I make more than twice that in all the cashback, so it pays for itself.Cashback
And they have a lot of Amex deals running, like 2 pints for £4 quid or get some X% off at some merchants, rental etc, which can be useful from time to time.
And great customer service - and super easy to dispute a charge. Once when AVIS claimed that a dinged a car wheel, which I didn't, it was one of those late night drop off places without inspection and tried to charge me something stupid, I called Amex and they immediately dropped it off the bill within a day or two.
And great at travel assistance too.
I am not saying they are the best out there ( by no means) or the greatest, but it's a useful card to have, depending on your lifestyle.