I did the Stealth on all the matte parts; the bumper, grill, fender flares of my AG truck, but did the rest in Ultimate like daaan. The product looks great, the issue I had with doing the whole truck is caring for a matte finish. I use my truck off road a lot and keeping a matte finish clean is a bit of a PITA. I was also concerned with long term care and durability as the research I've done on it is kind of sparse, I don't think the product has been available for that long.
The Stealth I do have has held up well so far but I notice when I wipe down the truck after a wand wash that those parts have more residue on them and sometimes take a bit of elbow grease. It's not terrible but it's definitely not as easy as the glossy Ultimate stuff.
I think it would look great as a full wrap on Magnetic if the added care isn't an issue for you.