We thoroughly enjoyed our stay at Windbell Villa. Our rom was right by the pool so it was only 10 steps between the door and a jump into the water.
The room was big enough to not feel cramped (important when you stay for a month). The Internet was...OK, good enough for email, almost good enough to stream entertainment from the Web without buffering.
Hoi An Town is 1.1 kilometres away, a 10-15 minute walk away, best restaurant 'Miss Ly'. I had some shorts and shirts made, my wife some dresses at BeBe1, not super cheap but reasonable.
An Bhang beach is one of the best beaches in Asia and about 30 minutes away by taxi (VND100,000).
We would have been happy to stay longer, if travel plans allowed.