I used the card in my hotel stays in the int'l trip - at Langkawi, KL, Bali and Singapore for all payments more than what was paid for by points redemption. Wherever I used it, I received 5 miles per 100 spent. Even if I were to take ~5% as payout incl. GST, net gain was 5% in this (I don't have a Reserve so this was a good option overall). As such there was no issue even at any physical locations. Only for IHG where I had bought their points using this card, it seems such an activity doesn't count under Hotel spends. So I got only 2 EM instead of 5.
Please note I have no idea of usage in India hotels in Tier-1,2,3 cities (have used it once in Eros hotel, Delhi and I got 5 EM/100). Not even sure if all are mapped properly. My only guess is all of them should be following a similar MCC code and hence for hotel swipes it should be mapped hopefully. For travel websites, except Traveledge and Airline websites please don't use this card as 4% isn't too appealing when there maybe better options with other cards.