I know this is veering into OT territory, but since we're on the topic of things to do in and around HCMC, what is the ideal length of stay there for a first-timer? I'm looking at a 5-6 day trip around SE Asia, and was thinking of 3 nights in HCMC, followed by 3 nights in Siem Reap or Bangkok (been to the latter but not the former). But if HCMC and nearby has enough to keep me busy for the full 5-6 days, I certainly wouldn't mind staying longer at the PH, which has been on my Hyatt bucket list for a while.