I got a pair that I have used for almost two years now. Have had no problems with them. I love the fit of them as well. I have used them on all sorts of river bottom without an issue. I also use them in the winter and had no problems with icy and muddy banks.
Mark, you should be fine on your actual size, I also have their Marlwalkers and use the same size as my standard shoe. However you will want to check the thickness of your neoprene stocking feet, this will have an impact on the size of boots you need. Plus remember its best to have some room so that your feet can breath.