We didn't plan to come here, but I love that they offer a free shuttle from the bus station (even though it's within walking distance) and the rooms looked decent enough.
We payed 50,000 KIP for our double (Nov 13) which is not the cheapest in Vang Vieng, but what you got for the money was OK. The drain in our bathroom was not really working all too well and the windows don't have bars in front of them, but the rest was fine. We slept well enough on the bed and nights were so cool we didn't even use the fan.
There are roosters nearby that make noise during the night and in the early morning ours, but I guess you have those everywhere. Still maybe not good for light sleepers.
The staff is rude unfortunately, the lady at the counter never smiled, greeted and rarely said thank you, even though I helped her out writing a sign.
All in all the place is fine.
Oh and you can bargain a bit on the bus prices (get them down by 5,000 KIP maybe).