That's truth alright but amplified by a factor of 10x. I am Diners holder myself and used it without any issues in at least 9 cities across India at small and big stores. It is only online (Razorpay) where I have found an acceptance issue. The reward rate, while not in the top league, is still miles better than any ICICI or SBI card I can think of and even some other HDFC and Axis cards. Spend-based lounges are absolutely fine if someone has a limited number of cards and does have the relevant spends. The BOGO on BMS is a sweet addon if anyone is into movies.