I stayed at Maxim’s Inn, December before last, in the superior room - one with a window, pictures below. It’s right at the end of Soi 7/1 so little or no traffic noise. It is however across the road and two buildings up from the Green Room which has live bands playing in the evening up until as late as 2am. From a noise point of view it felt like the band was playing in the room with me. So not recommended if you are looking for a quiet evening.