The name almost seems to suggest that the use of a grid is a bad thing.

I checked out the demo, expecting to see some nice use of grid layouts but without the dreaded "silly classes."

But no. I see some OK-looking forms and tables in a fairly linear structure.

Indeed, true the name, it is gridless.

Do you need a framework for that?

"Beautiful typography with a vertical rhythm."

Even granting "eye of the beholder" and all that) , there's actually not much rhythm going on here.