I hated Cambodia
I don't know why people say Cambodia is so cheap. We were overcharged for everything. Our visa, our transport, and especially the food. ($5 for one pancake and a sliced banana?!) Ankor Wat is lovely and I'm glad I saw it, but after the horror of customs and constantly getting ripped off, we decided to leave early. And then got screwed again at the aiport by being overcharged to check bags. Maybe other cities are better. I don't plan to return to find out.
Insider Tip:You DO NOT need U.S. dollars. We found people to take our Thai Baht and Chinese RMB with no trouble. Our tuktuk driver (the one honest person we dealt with) took them, Ankor Wat will take them, convenience stores take them, and so do the restaurants. Don't bother getting Cambodian money unless you plan to spend a lot of time outside the cities. We only had to use it once. I live in China, and I didn't want to pay multiple exchange fees to have dollars so we just skipped it. It was fine.