Fits nicely to the edge of the tent. It gives it a nice homely feel. When we used it the weather was good so it remained dry. As yet we have no experience of what it's like when wet from shoes.
I'm slightly surprised it doesn't clip to the edge of the tent to keep it from crumpling up from movement on top of it at the edge (where we placed a chair (it was only a minor issue though and not hard to solve. It well worth having carpet. We bought it as part of the tent bundle. £80 when sold seperately seems excessive