The smell. Holy moly, the smell from these things. I bought two of them for my office and we put up with them for about 25 minutes before washing scrubbing the underside, and ultimate discarding in the bin.These mousemats are quite evidently cheaply made and curl up at the edges, but the most striking thing about them is that obnoxious toxic chemical smell that accompanies them. I can only imagine that they've just some kind of active plasticiser or pthalates or something to keep this 'gel' thing squishy because bad smells usually always serve as a warning. I cannot recommend this product at all.It's genuinely made me feel light headed, if I'm honest. We've had the window open and fans on all afternoon and there's still a unpleasant lingering smell inhabiting the room. I can't even blame one of my colleagues for it because no human has ever physically produced a smell this awful. Not even my uncle Steve, and he stinks.This product meets its description, but oh too shortly after unwrapping this beauty did I discover its dark hidden secret. This thang smell of big, big nasty. It is a smell I wish not, and cannot describe, for English can only describe so much taint. This mouse mat, though comfortable to use and conveniently sized has perturbed my nostrils and the entire olfactory segment of my brain to such a degree, that if a Russian missile were to land directly in my living room, obliterating me, the mouse mat, and my prized collection of funko-pop figures, I would be a much happier man.Good day.The mouse mat doesnt even sit flat, which renders it completely useless. Ive placed it under my printer for two days straight in the hope it might flatten it out, but no joy :( ...it now just sits in the drawer.DO NOT BUY THIS MOUSE MAT - Spend a little more money and buy one that is stuck to a rigid base!!!The smell that comes off this product is horrendous. I tried to persevere with it all day. I even washed it. But the fumes were awful and made me feel ill so it has been sealed in a bag and put in the bin. Not happy.This is quite possibly the worst product I have ever purchased from Amazon.I bought it to replace my old mouse pad and as soon as it was dropped through the letterbox I could tell they were vastly different. Firstly, this one curves up at the sides due to poor construction which makes using it near impossible.Secondly, if I do attempt to use it, the "comfort gel" wrist rest feels absolutely solid. It left me with pins and needles in my hand after only 30 minutes use and then went directly in the bin.If I could I would give this a negative rating, not 1 star! Avoid this product at all costs!