Well the fco have an email they send out every now and then which is the most important to keep an eye on any place mentioned on there from an insurance point of view is a complette no no. but of course its up to you if you so choose.
Im sure others will tell you one of the most dangrous places is Manila like London and other large Cities the crime is normally much higher there.
From a health point of view if you take the right precautions. Don't drink un boiled or bottled water (from a recgonised bottling plant), keep hydrated, avoid ice in your drinks. Plus all the normal precautions you should be fine.
Many Phills will understand that you have a weaker stomach for the local food bugs around so will go out of their way to make sure the food is well cooked and kept refrigarated. When I go over my food left over goes in the fridge everyone elses just sits as they normally do with a fly cover in the shade on a kitchen table. They can take the bugs i can't i, so its just adapting to the enviroment.
Just take precautions and enjoy yourself im sure your be fine
