I decided I'd call an expert and spoke with my brother last night who's a mechanical engineer and has quite a bit of experience with rapid prototyping machines like this. His advice was that if you expected anything other than a prototype out of it you were doomed to be disappointed. The 3 major weaknesses he noted:
1. While the stated accuracy sounds nice (.1mm), it really isn't all that good. It'll result in noticeable surface imperfections and stair stepping artifacts as the machine lays down the layers. He went on to say that round or curved objects would fare even worse.
2. Given the above he also said it's worth mentioning that it's very difficult to do any post processing of the prototype. What this means is that the material does not respond well to finishing techniques like sanding, sculpting, etc.
3. The results of the printing process are not permanent or particularly durable. While some bonding between the layers of material certainly takes place it doesn't hold up in the long run under use.
So what all that really means is that this thing sort of "is what it is" and if any of us had hopes of producing permanent parts with it (like knobs, enclosures, whatever) it'd be a bad idea.