Located opposite the BNH hospital, the Pad Silom shouldn't be hard to find. It is within walking distance from the BTS Sala Daeng and MRT Si Lom stations, which makes touring around easy. Along Convent Soi, there are lots of street food from day to night -- except on Mondays, which we figured to be their day off.
Convenience stores are close by too, so we could easily stock up on dairy products and/or bathroom supplies. The staff are helpful, too. The person in charge gave us a map and some recommendations on the first night of arrival.
While the rooms are tidy and clean, there were some ants here and there. Be sure not to leave groceries out in the open.
The bed, while not of hotel quality, was comfortable. The nearby car park complex, however, had the lights on 24/7, so depending on where your room faces, it might not be absolutely dark even when you turned of all the lights inside. That being said, nights were peaceful and so were mornings. Not much noise since it was some distance from the vibrant Silom nightlife.
Plenty of restaurants and options around. I'd recommend Pad Silom for people who don't mind a bit of walk here and there.