Yeah.
I have a Corsair MM350 Extended, I wanted to change to something more aesthetic for my white desk.
This carpet is quite disappointing: When it comes out of the box it is all deformed and the corners are "turned up" towards the inside. I told myself that it's normal, it's fabric, and that it needs to be flattened a bit to get it back into shape. So I put it under some heavy books for a few days. And 2 weeks later, it's still standing up on some corners of the carpet. In short, it's not great in terms of product quality (especially compared to Corsair). But the glide is nice though.