I've just got my Adapted MACO XII sets, though I was not impressed with its visual. I want to disable the visual, but I want to showoff that I got the MACO set too, so I need to make a decision whether I keep the visual or not.
For the fleet default skin, it has a green outline around the ship. It looks badass when it's in the dark and it looks pretty cool in the light too.
For the MACO visual skin, it looks like a tech advanced ship with bubble shields and it is pretty cool imo. However, it looks plain when the map gets lighter; it looks like a normal Ha'feh with default skin on it, it will be very hard to see the bluish bubble shield effect.
I have pre-S7 MACO shields on my Fed Eng's Regent, but I don't use the MACO visual because I prefer the shining white hull. If you prefer the Fleet material over the MACO visual, go ahead and disable the visual.