I much prefer MUFE over MAC for foundations and powder in general, and MUFE Face and Body is a great product. However, it is NOT HD, so if that is what you're looking for, this is not the product to go for. I've used it before to change some model's skintones (make them look tanner, porcelain skin {for an avant garde doll shoot}, etc.} {also, think ANTM's models of different races shoots}), and it's great for a balanced, perfectly even look or disguising or changing various things on areas other than the face. If you want a lighter, realistic, fantastic foundation, go for MUFE's High Def Foundation. It's insane. Just be sure to get a sample of a few colors to try out at home, as Sephora's lighting is dreadful, and I ended up purchasing a shade three darker than what I needed, and had to go back to exchange it.
But to jump off of puffypaint92's post, I strongly advise against the use of any sponge with Revlon's Colorstay... Although I love reg cosmetic sponges and the BeautyBlender for other foundations, they simply don't produce anywhere near the results of a brush for this. However, for MUFE's foundations, and many others a sponge is fine, although, if you have access to a brush such as I described, this would still be my preferred method.