I'm not sure if they love it that much more than the Marmoleum Click we had, or just more than the torn up floor with disintegrating acoustic pad. ;-) (That story, and the options we were considering were discussed in Torn Between Two Covers)
It's the DevineLock plank vinyl tiles by DevineColor, in their Burr Oak color. It seems solid, but comfy to stand on, and it also seems like it will hide a bit of everyday mess, be easy to clean, and according to our research, as well as the feel in person, be tough enough to wear well and keep looking nice over time.
It's lighter than I expected, since it appears that the sample we had was a section of the darkest shades. But that's I think lighter than expected is probably better than darker. I really have to paint our kitchen chairs now, though, as they look so blah, without any contrast to the lighter floor.
And it took a lot of the night, but I finally got our dining room from looking like this...
To this, to prepare for today's family Christmas celebration: