The primary reason for choosing this hotel was its close proximity to the Samitivej Children Hospital. Pros: It was a 15 min walk to the Hospital, but we never had to walk there. The hotel receiption always called the Hospital whenever we needed to go to hospital and the hospital sent micro bus to pick us from Onyx hotel. All receiption peoples and staffs are very good and they were always helpful. The restuarant people are also very nice. The hotel was very clean, room was cleaned everyday.
Now the cons: there was no convenient store nearby, you will have to walk at least 15 either way to reach a convenient store (7-11 or Tesco). Apart from in-house restaurant (Daddy's G), there is no other restaurant in close proximity. The nearest currency exchange is about 2KM away that closes at 4 pm and operates only on working day. Alternatively, you can go to Mall Bankapi with 30 min (100 bath) taxi ride. The breakfast buffet only served Chinese food, as these hotel seems to have concentrated Chinese guests. The TV channels are all Thai language, in addition the TV language was set to Thai, so it was not possible to search for any other international channels as we didnt know Thai language.