Tour leader Hoa was awesome! She was professional, gave great advice for meals not included and went above and beyond when a traveller fell ill. My advice is to arrive in Ho Chi Minh City at least 1 day earlier and visit the Cu Chi tunnels. There are plenty of places to exchange currency in all 3 countries. Word of advice for Cambodia, they use US currency
...read more but will only accept clean, crisp notes. One note was rejected because it had a tiny tear. Food is fantastic and so cheap! Get a massage in your free time and don't forget pub street on Siem Reap. Do not do this tour if you don't travel well in long car rides - the drive to Bangkok was 10 hours in a van. Overall a great holiday, and highly recommended.