We finished the last piece of the cat path I posted about earlier! This one goes from the laundry room, to the stairwell, and then into the guest bedroom on the upper floor (yes, I know the carpet needs replaced in that closet). They are already using them and seem to love the new path already.
They can be kinda loud when they are playing on the ones in the hallway, but that wall is the other side of our closet, so it is mostly muffled thumps. Not enough to keep us awake or wake us up, but loud enough that you can hear when you are awake