Our stay was quite nice and we didn't have any problems. Still, we noticed two things that could've been a problem. First of all there really weren't enough toilets or showers on the floors, one of each for men and women (separately). And the men's shower was broken during our stay. Luckily the hostel wasn't too packed so we had no problem with that in the end. Also, the shower's temperature could not be changed, which is always really annoying.
Definitely a great place to stay when visiting Chateauneuf-du-Pape. Everything is within a few minutes' walk. The balcony at the B&B is a great place to enjoy a glass of good wine at the end of the evening.
Everything was in order and our stay was very enjoyable. The location is easy to find, but it is in the village of Valros near Pezenas and Beziers so it practically requires a car.
The hostel was quite clean and the location wasn't bad. On the negative side, I found it quite unprofessional that (a member of) the hostel staff complained to us about "making noise and waking her up" as we had entered the hostel relatively quietly, starting to get ready for sleep while exchanging a few words in a normal tone. Even though we were happy to have the breakfast, which was by no means a good one, it was annoying to realize we have to dish our dishes since the machine was broken.