the Mandarin Hotel is best . Very friendly staff who greeted you and helped with everything we needed (get them to book taxis for you!). Location is near to MRT and also to my meeting venue (along Rama IV road). For the price we paid, it's a super deal! Will definitely come back here the next time we are in BKK. Plus a few min walk along Rama IV will get you access to delicious (and cheap) local food. Do not forget to check out the stewed duck noodles from Buay Pochana, about 5 min walk to the left of the hotel.