It was difficult to find a mat this size and without spikes. Now that I have it I am completely satisfied. There is no static buildup or curling. I only give 4 stars because it would be great if this particular size of mat were offered in a complete rectangle shape rather than notched for a desk. To get a full rectangle you have to go to the next size up which is too big for my needs. Otherwise great purchase. I recommend it.
as the weather warms the wheels create pockets in the plastic. when the weather turns cold the plastic cracks. this product does not have a very long life.