Hi.  I really don’t think anyone can answer this question at this point.  Nobody has actually heard it yet.

I doubt very much that a Sonos staff member would or could comment definitively on this, but I may be wrong

The Mini sub is designed to work well in smaller rooms...but “work well” and “smaller” are both highly subjective.  I plan on using a  Mini in about a 10”x10” room with Beam and 2 play:1s, and I expect it to make a very good impact, but not blow me away.  But I am only guessing.

I would always expect a Sonos employee to reply “yes” to this kind of question.

And I agree completely with @John B ‘s statement.

At the end of the day, it will be up to your personal tastes, your room, your ears, and your music choices. It is indeed fortunate that Sonos has a ‘trial” period if you purchase through them. Some outside retailers also have that kind of thing. 

I’m sure it will be available on “home trial” like all other products. Try it in your own home and let your ears decide.