I tried this one out.
Of course the obvious issue is how it will perform w/ old acad files, and we all know there are a lot of bad acad files out there, where endpoints don't meet, etc.
Personally, I prefer to use old acad files for refrence and just remodel a part, so that I am sure that it is correct, etc.
Nonetheless, the tool is kinda' cool to play w/. It did a couple of simple parts, very well and very quickly, but I was able to break it by doing a more complex part.
my $.02