To clarify, this review is about the Organic Farm itself and not the Organic Farm cafe in town.
I stayed on the farm, as I suggest ANYONE visiting Vang Vieng also does. Seriously, do not stay in town, you will hate it. The farm is lovely and the restaurant attached is great, perhaps the only place in the entire region for the discerning veg*n in fact.
The options are interesting and unique. There are veggie as well as vegan items you will not find elsewhere in Vang Vieng, or Laos for that matter! But please note, you should ASK and not assume that a dish not listing meat/fish/milk/eggs will not contain it. The staff do understand these requests, but they do need to be made!
Lao Bamboo soup is one of the best vegan dishes I had in the country. SPICY as hell though (not a bad thing ;)
Cons: Not the cheapest, Slow