The one problem we're having is a temporary one. A couple of the pieces aren't glued down properly, so they move vertically when pressure is applied to them...not a big deal, but want the job done right and don't want to catch anything on a corner of one of the pieces, so they're fixing it asap.
Looks great, IMHO, and worth the extra cost over high-quality linoleum squares.
I would think it will require an underlayment also ask how they plan to attach to your other floors,(some kind of wood trim?) good luck
I had it installed in a house we were not living in while renovations occurred, so it actually expanded a bit once we moved in and turned up the heat, but all that happened was the small seams we thought we saw before are even less obvious and the tiles that seemed loose, laid down nicely and haven't been a problem again (yet).
Luckily our supplier is helping us with a floor replacement.
I would not recommend Congoleum DuraStone.