Traveled Siem Reap to Pakse using this service. Online booking and communication brilliant. AVT is very prompt, collected from hotel and the group left from the office. The van condition is ok. Driver to Stung Treng was great, we were flying and made the part of the trip just under 5 hrs. Roads are poor, I am mentioning in case anyone has not considered this part. The trip is crap only because of the road and not the length of the trip.
Van swap at Stung Treng. Another great driver in an ok van on awful road to border. Crossing, as suspected, dodgy as, no we were not just charged USD2.00 on the 2 sides. The "guide" in the bus took USD10.00 to "organize everything " So my visa was NOT $30.00 but really $40.00 A young Dutch traveler for no real logical reason was later asked for ANOTHER $5.00 with some shitty excuse of a stamp or something. Look, we all know these "systems " I feel sorry for such weak people scamming at border crossing of thesr not so by the book countries. The actual crossing took about 40 minutes, who knows what games went on in those offices. I was just glad to have my passport back in my hands after all that time. No regrets but I sure won't be doing it again. Just to clarify, AVT is a pro service under limited flexibility and no transparency, I am wondering the guy running it knows what really happens at the border with the drivers. Cheers.