Wow..I can't believe that this kind of public bus services in Thailand now has more developed. Nakhon Chai Air,..It's really cool luxury 5 stars bus and really look like you are boarding the airplane. How nice if some of the private bus company in Laos will invest this kind of transports between Vientiane <-> LaungPrabang?
Anyway, I still prefered to catch a plane to save the traveling time.
