James,
Where you put the basket/login details (bottom left) is
completely against all usability research.
The table-in-table-in-table all with borders catches FireFox 1.5 off guard on pages like
this one.
I'd space the search results pages, especially when no result is found you can hardly read the notice.
Unexpected PDF for t's & c's isn't the best of ideas IMO.
Looking at a page like
this you will probably find it hard to get indexed in the search engines well. The ratio of actual body content to peripheral static stuff like all the left hand navigation and right hand promo stuff is not in your favour. Add more body content for each section/product.
You've copied the META descriptions into the META keywords.
Your checkout relies on Javascript without submit buttons. I (and others) have Javascript off by default and could not check out at all. Asking for referer details first would have put me off as well and I'm now stuck
there with no way of continuing. The footer also needs to be spaced away, further down. I also find it strange how you first use asterisks * for required fields but don't mention they;re required and then change to underlined for required. Stick with one or poeple get confused. Underlines are for links so make them *s.
I also think your buttons don't look likt buttons enough. Especially on the log in page where the header is exactly like the login button but without any visual reference saying one is different than the other.
Centrered text reads horribly.
Besides all that, it does look nice and fresh.

Your product presentation is good, could just do with some more sales pitch. Most of the points above are easy to improve as well. Some are just IMHO, most are based on research facts.
Hope that helped.
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