We stayed here for a week early September. We were a group of 4, but the house is perfectly suitable for a group of six adults too (do take into account that the 'children's' room has a bunk bed, but one of a decent size). Also, the 3rd bedroom is actually a mezzanine.
The house was very clean when we arrived, the owner very friendly. It has everything you would want: decent sized bathroom with shower, fully equipped kitchen, nicely sized living room (if you would ever want to sit inside) and the garden is very nice with an overgrown terrace for shade, so I can imagine that even in summer, it's a nice place to sit.
All in all definitely a place I will consider going back to.
Do remember to bring something against the mosquitoes, because there where a lot of them (not something the owner can do anything about off course, and he did provide with plenty of anti-mosquito stuff).
Also I added an image so you can see where exactly the house is situated, that wasn't very clear to me. Konoba Forte and Ciringito are recommended if you want to eat something in Viganj :-)