Just got out mat few days ago, and looks very good and sturdy. Overall, it looks good and performs well. Seems as advertised.

Wanted to update a 19 yr. Old mat. My only complaint is that it shifts around a lot.

Setting it out flat on the porch in direct sun for the afternoon with some flat weights (not much like 2 to 5 pounds) helped flatten the slight curled edges. My rolling space is small.

The plastic is so soft that the chair just sinks into it. Far too flimsy and flexible. Not as advertised and misleading.

If i roll the chair too far, then the mat bunches up under the wheels. The mat still curles up on the sides. It is completely unusable since my chair slides off the mat every time i move.

It ripples and won't stay flat. Does not become flat and forms a wavy pattern. When removed, it appears that the portion under weight has been flattened. But within hours the shape turns back to the original wavy state.