Mass is mass, so MLV works but is among the most expensive sources of mass. Often used under carpet if all you have is 1/4" to spare. Otherwise plywood, OSB, and drywall are all more massive choices for much less. Also easier to install. You also then have the option to damp the old and new plywood with a damping compound.
MLV, while itself internally damped, does not appreciably damp the mass that it in contact with, which is a really big deal.
The Soundproofing Company