[glewis80SC]

We went through all this about a year ago, decided on engineered glued to concrete subfloor our neighbor floated his and we didn't care for the feel, kind of hollow sounding. Went with product from Alston, local for me, good product with good warranty. We are a busy family of 5 so we went with a distressed look and darker Walnut color we also had alternating size pieces 3 1/2" and 5" very happy with the look.
That being said the darker color shows dirt and dust more so to keep looking nice sweeping and vacuming more often is required, get the hardwood floor cleaner BONA it works great, spray on wipe off put felt covers on any furniture that touches the floor.
Our installer included removal of old carpet and demo of small tile areas in the the install, they did the demo and sealed the concrete on day one and the next two was the install. My two boys and I did the base board and quarter round, that was fun I didn't know there was a 22.5 degree miter cut but there is.
It is my understanding that the concrete has to be sealed before the glue can go down, that prevents any moisture problems. I'm glad we had a pro do the install the glue get everywhere and it take a team to keep it from getting out of hand, and it was done in three days it would have taken me a lot longer.