Hi Lee
Yes indeed I am in Davao. Matina is very central busy area, lots of shops, banks, etc. I don't have any experience of housing in that area, sub divisions etc. As far as I remember there has been some flooding alerts for that area when there has been excessive rainfall for any length of time.
I am still in Dubai at the moment, moving over to Davao full time at the end of the year. I will make a more detailed investigation and report back.