Hi Girls
i did this trip in October 2006, with the cambodian add on
It was brilliant beautiful scenery history and fabulous hotels all 4star plus
Informative local guides accompanied us through out you realise after visiting vietnam just how wrong the war was and how hideously the americans behaved.
One word about the food though, it is very samey equivalent of a thai banquet every lunch and evening, i went a la carte very often and had great european food at a very good price £12 for 3 course steak dinner.
if you are lucky like i was our guide took an unscheduled visit to "The Killing Fields", after visting S21 in Phnom Penh.
be warned though when you get to Siem rep you will very soon be "templed out"
hope this helps
steve