Not good, not good at all

For the first few months this was a decent mat...before it began to curl upward. Then it became dangerous and almost unusable. If a chair caster went off the mat, it would catch on that curled edge and wouldn't budge. Worse still, because of the curl, particularly the corners, and the location of my desk, the mat was a safety hazard. Easy to trip on if I didn't closely watch where I was walking. Not good for a senior. Finally, I couldn't take it anymore, having tired of swearing at it and hoisting the chair back into place if it had strayed. I don't know if other purchasers have had this problem, but I wouldn't purchase this item again even if it were the only one available. A terrible purchase.

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