Have bought several of these the past few years and I would like to see them made more crack-resistant. I am the only person who uses the desk where this mat is used and it is not abused. The wheels of the chair are plastic and yet there are indentation marks on the mat every day.
I only weigh 150 lb and I am using a executive chair with 5 rollers. the weight of the chair on the mat causes depressions making it difficult to roll around on the mat.