do yourself a favour and read a bit of forums on rcg or on malaysia-rc.com ,which should be their "official" support forum....
their product is a good idea, probably from a hardware point of view it is well made... but the firmware basically isn't ready yet.. we have all been waiting for months for a promised upgrade but everything has gone silent from them.. they don't respond to angry customers any more on their forum..
download the user manual (which took them 7 revisions i think before they got it right..) and their "parameter setting manual" that was released only months after they started selling the product and that basically explains NOTHING ...
i don't have the gps unit, luckily i saved that part of money.. the flight control is totally mad and very very sensitive to minute changes in setup.. every time i took off trim was all over the place and had lots of toilet bowl effect. Then , to top thing up, it has auto level that has a mind of its own; even if you keep giving forward stick input, after a couple of secs the craft will stop and you need to give more stick input.. its a constant fight, there is no way you can do good smooth filming with that crap at the moment. Its ok for photo work or for fun flying, i had a few good flights just for fun, but if you need precision, forget it.
it has been collecting dust in the last weeks, don't think i'll try to bother with tweaking it until there will eventually be a new firmware from a company that i think is going down by the looks of things...