My partner and I stayed at The River Resort twice during our travels around Laos.
The resort arranged a minivan to collect us from the airport and thank goodness we did as it is miles away from Pakse airport! It is beautiful, so green and lovely. We were greeted nicely with a welcome drink and taken to our room. The rooms are exactly as per the photos you see on the various websites, they are clean and bright and nicely furnished. The inside and outside showers are a fantastic idea too.
We had some issues with ants getting inside, so I asked for someone to come and spray which they did happily do and explained it was just wet season.
The restaurant does great meals, breakfast is from a menu but is included in the room cost. The french toast was delicious, definitely worth trying! The lunches and dinners are also really tasty and reasonably priced. My advice is to eat dinner before dark in wet season though before the bugs come out!! This is not the resort's fault, it's just nature during wet season!
The staff were all really helpful and the lady that works at reception who I think may be manager is really great, she assisted us with any queries and nothing was too much trouble.
They will book tours, but be aware you are only paying for a driver, it is not a guided tour. They also arranged a boat to collect us from the other side of the river to assist us after a cruise - great service!
Overall, we really enjoyed our stay with The River Resort!