I fly out of Dubai frequently on VATSIM so I eventually decided to purchase this scenery. It's a good scenery, it makes Dubai and it's airport look quite nice and accurate to the real thing. Like others, I have experienced no FPS issues at all with this either, I'm almost inclined to say that this runs better than the default gateway scenery I used to use.
There are some minor issues like the E stands not being entirely accurate. I'm unsure if this is the case of other stands as well, but the E stands are not accurate according to VATSIM atc. Not a huge problem though. With the lack of a good freeware Dubai this is a must have if you like to fly from Dubai.