While I haven't tested it, it appears to be of high quality. It remains stable on the tile and doesn't slide.

The quality is very good, and I like it.

The product matches the description. It's good quality and a good price. I've used it several times and it's comfortable for doing abdominal exercises. The bottom has an anti-slip feature so it doesn't move while you work your abs. I recommend buying it. The price is very good compared to similar products I've seen, and the quality is worthwhile.

The product matches its stated characteristics. Delivery to my house was fast, approximately a week later than expected.