Its hard to know how to rate this hotel as there is really no good lodging available in Phonsavan. It's said to be one of the best places in town, but if I were to rate it against hotels in Luang Prabang or Vientiane it would barely earn one star. Saying this place is rustic is being generous. A single bare lightbulb hanging from the ceiling, no fan, no screens on windows, etc. etc. on the plus side, it is reasonably clean and the staff are very friendly and attentive.
The really bad thing though is the noise. There is a bar I town at the foot of the hill that plays loud music until after midnight, every night. Some nights it is extraordinarily loud, like there is a live band in the room next to yours. Unless you can sleep during a party, don't expect to get much rest here, or anywhere else at this end of town
Tip: this hotel is isolated on a hilltop so it's not easy to get into town for dinner. The restaurant on premises is fairly expensive and the food is poor. Consider getting dinner before heading to the hotel.