Pro: Great mat that I use for my computer chair. It's nice that it is a softer plastic or polymer so it is pretty quiet even when I'm rolling back and forth. Con: The main downside is that it smells like, well, gym mat and is pretty strong. I thought it would go away as it aired out, but it's been 3 weeks now and it still has a strong odor. I wouldn't call it a terribly foul odor that is unbearable, but it sometimes reminds me that I should probably be going to the gym when I'm on my Netflix marathons. The other downside is that it comes rolled, and has yet to completely unroll. Again, it's been about 3 weeks. Although mainly a cosmetic issue, I can see it being hazardous for clumsy people.
This product should come with a warning label for the smell. I have a rather large house, and the smell filled every room within 30 minutes of unrolling them (2). I've tried washing them by hand with soap and water but to no avail. This product may be great once the smell wears off but it's truly a foul smell. I would never recommend this product.
This item fit perfectly under my treadmill and has kept my floor in good shape. Would recommend to anyone and everyone.