I needed a thick mat under my heavy bag. I use it to practice Krav Maga, which means a lot of moving around on the mats in order to kick and hit. I need a secure and safe surface. I just got my 3 packages today and put them down. They seem to be well made and sturdy, firm, but not too firm. They make an attractive work out area, and much safer than a concrete floor. I am very pleased. I am also extremely pleased and impressed with customer service at BalanceFrom. They answered my query promptly and gave me excellent service. Highly recommend.