Are you from the Philippines? if not, I see no advantage of using a Philippine based broker since you can opt for Oanda, Alpari, Dukas, FXCm, Gain and other globally established brokers.

Well, if you are from the Philippines, I guess using your local broker wouldnt be too bad, since they will have a local office and is regulated by your local regulators (so if anything happens you can complain to them straight).

You will have to check out their business model (their market making and STP/ECN policies, and what sort of precaution steps did your local regulator imposed on Metisetrade - Just in case they go bust from market making too much) and also if their spreads are competitive (do take note some of the local clearing houses have additional charges).

P.S. the interest on the deposit is a very good advantage over other brokers, but I am skeptical on this. How would they calculate the amount of Interest to be paid, unless you win every/ majority of your trade, most of the time your account balance will increase and decrease as time goes by.