I stayed in Nam Son for two days. The room was very spacious and well furnished, plus a good sized bathroom with a shower in a bath tub. You do have a choice for breakfast that is included with your room price. It is very clean, staff very friendly and helpful. However no one really speaks English, but they try hard and will look up for a translation on the net if necessary.
The bad thing is the location though. It is far away from the city and actually further away from the floating market than the Ah Bin Hotel. So note, the location on the google map through Agoda.com is not correct. Even on their own brochure the location is different from the google map, but still not exactly where they actually are.
There are no places that you can get something to eat at night and it is not in an area that taxis do pass, rather dangerous to walk as the road is narrow, but busy and you do have to cross bridges.
The first night I could get a meal at the hotel after I gave up my search. There is no such thing as a menu and you have no choice. But they cooked me up a soup with prawns and squid (google translation: fresh ink :).
The second night, they had the restaurant closed though.
If you do have your own motorbike, great place to stay and very good value for money. If not, you may be better off in a hotel in An Lac, where the boats leave.