depending on which amex card you get you might get a lounge access pass. I think that is with the chargeable card.
Generally Amex do one of the best cashback schemes and there is a shop smaller scheme around Xmas that can be lucrative. If it is your first card you may not get an Amex card – it would depend on what else is in your credit history
I have moved the thread to the general CC section as it wasn’t a Stoozing query