The site looks good, works well, and I get the idea right away. The two stumble points I ran into are 1) why would I want a mouse hand warmer, and 2) the block of content on the home page.
Studies and research show time and again that reading something on a computer monitor isn`t the same as reading it in a book. There has to be more contrast on a monitor, and more blank space to pinpoint where our eyes should go.
To that end, I`d like to see the introduction broken up from a single paragraph, to several small and short paragraphs. Make the text color black, not gray. It`ll be easier to read.
In the content, add something to explain who typically needs one of these. It`s not enough to say "for people with exposed hands." I generally use my computer indoors, and don`t have my hands outside.
But basically, the site is very nice. I like the images, the layout, the navigation, and the color scheme. You also have a BIG advantage with the PC Magazine testimonial and logo right there on that home page.