I recommend to all Indian people not to go for American Express cards. They are very badly manage customer service and they charge you without your confirmation and you spend your quality time in resolving issues.
I have used Amex Kingfisher card and I had very bad experiences so far. I have to cancel my credit card, due to lots of disputes & issues. I never had such experience with SBI Cards, CitiBank Cards, HDFC Cards and any other credit cards. They are big cheaters and big time liars.
Never-ever go with Amex Cards and very few outlets in Bangalore will accept these cards. This card will be a pain for you ever. Never try also.