Very lumpy, even though I got a rug pad and also taped down the edges of the rug. I’ve tried multiple tricks to get it to lie flat, but it just won’t. Also, the print is strange. It almost makes you dizzy when looking at it, like the same image was printed on it twice and they don’t perfectly match up. If that makes sense. It confuses the robot vacuum and it dies on it every single day. Haha