Simple product filtering implementation - feedback please

Hi there,

I've just put a new bit of product filtering live on a client's site, and I'd love a bit of feedback.

You can read a blog post explaining a bit about what we did here:

www.setfiremedia.com/blog/simple-product-filtering

and you can view the filtering here:

www.kikijames.com/378--Books-%26-Albums/6--Leather-photo-albums/

Cheers,

-Sam