Mass loaded vinyl for soundproofing SFH with renters downstairs.

[Benjamin Laudie]

Recently closed on a single family home with a legal accessory apartment in the basement.  My wife, daughter, and I are living upstairs and renting out the basement.  The house was built in 1938, and it appears that no measures have previously been taken to soundproof anything.  We are feeling most anxious about us hearing our renters, and our renters hearing us with our often yelling toddler. 

I have heard good things about using mass loaded vinyl to help soundproof.  Has anyone on here laid out mass loaded vinyl under their main flooring and been happy with the results?  Or were the results underwhelming?  

This is the material that I am referring to:  https://www.homedepot.com/p/Te...