I had an excellent stay at the Marco Polo Davao. It is truely a first class property.
The hotel is centrally located and can be seen from afar quite easily. Some of the best Souvenir shopping in the city is located directly across the street at the Aldevinco mall. Assuming that you can get past the guys with the bobo rolexes and you know how to bargain. That mall also has the best dollar-peso exchange rates that I could find in Davao.
Security is very tight - armed guards at the street entrance and a bag inspection and frisking at the door (which is standard at most large venues in Davao).
All of the staff are very professional, friendly and responsive. My room was always cleaned well with little intrusion to my odd schedule. Anything I needed from the staff was provided quickly and with a smile.
The one minor flaw is that there isnt anywhere in the property to grad a quick bite to eat. All of the resto's are full service. For this reason I might consider a Continental Club room on my next stay.