I'd done quite a bit of research and read many reviews after deciding that I needed a mattress topper. I didn't particularly want a 'synthetic' product, but did I fully trust that wool would regulate body temperature throughout the night - in summer...? I have to say, it is money very well spent! If you're thinking that it's quite costly when you can get a topper for a fraction of the price, let me reassure you, it will the best investment in your comfort during the night. There is no smell, you may well have read on other websites that wool can be smelly, it is a perfect fit (I ordered the double size), and during the hottest day/night of the year so far, think it was 1st/2nd July... I did not sweat at all despite the temperature outside being 24 degrees at its coolest. It is so comfortable; no lumps, bumps or shifting of filling, it is a fantastic purchase. I will certainly be highly recommending your product.