The mat itself is fine. However the product label that you stick to the mat does not come off. So now I am have a messy partial label on the mat. They should have used a glue that can easily be removed by the consumer.
Ultra low pins - about 1/8 of an inch. No way this is gonna work up to an inch carpet with pad. All waves on the carpet with the chair on... Customer service very unhelpful and rude : she tried to offer me 5% discount to keep it . I said no and then she scheduled pick up after about 2 weeks and after they'll receive it they will check it and after that will issue a refund . I just went to local Staples and return it .