Invention marketing and development companies are no different from about any other industry around the World. You have some good people, some very good people, some bad people, and some very bad people. Only the ratio changes from industry to industry. The trick is realize which companies fit into which categories, and unfortunately in the invention business, the ones who critique invention marketers know little about how to do the critique, and the therefore the dilemma. You can learn more, and get a free list if invention industry resources that are thought to be legitimate at http://dimwit.com a self-help website for inventors.