We are Product Design Sources (www.ProductDesignSources.com). We are an engineering design firm that specializes in military grade equipment design. Our experience with CraigslistAdPostingService.net has been phenomenal! We are an engineering company that has been in business for 25 years. We have used CraigslistAdPostingService.net services for every week for 6 months and they have never failed to deliver. For every $1 we spend with CraigslistAdPostingService.net, we get $10 return on our investment. that’s a phenomenal return on investment.