I have the older Korkers guide model. I've been really happy with the comfort and fit. The boa laces really work well in the winter when regular laces freeze. My only complaint has been with the studded sticky rubber soles. Because of the size of the studs, the sides of the sole tends to come out of the groove. The other soles seem fine and I don't think it will be a problem with the new design.
The soles have only fallen off once (one foot only) when I was kind of stuck in some middle river goo.
Mike also carries the Korkers if you wanted to shop closer to home. (probably has the Simms also)