DirtyPCBs detailed review by Gee_Rabid_Inventor:
Often design and research is and expensive business, especially when dealing with technology that your are unfamiliar with. A big proportion of this is PCB manufacture and I have spend a few years looking for a low cost reliable method for PCB production.
The most cost effective method is to have the boards produced overseas but then you won’t be sure of the quality of the boards until they return. This is where Dirty PCB step in.
Details at Gee’s blog.