I got the 9x12 and I love it! Not just me, but so does my boy! When opening the bag to get my carpet out, it does have a vinegar smell, but the smell went away after a day or two. I had to order a rug mat as this mat does tend to slide around when my dog is running. The website did recommend me to buy a rug mat then, but I didn’t so if you have vinyl floors, I would recommend you purchase a rug mat as well.