A few years ago I used Asia Pioneer for a trip to Vietnam. Mr. Lam set up a great tour for us in north, northwest, central and south Vietnam. So when I needed to set up a Cambodian tour on short notice I immediate thought about Asia Pioneer. Mr. Lam came through again!
We spent five days in Siem Reap, several days in Sihanoukville and three days in Phnom Phen. IP set us up with guides in each area. They provided me with the guide names and local telephone numbers in case there were any problems. Also the IP office told me how to contact them directly and Mr. Lam and I kept in contact on Skype. In all they made me feel confident in a foreign land.
The day trips we arranged were very good. The guides were knowledgable and had good English skills. I will certainly use IP again if I am in their service area.