It's working really well when engineers hire engineers. I've no problem with that. They don't ask questions like "Why do you want to work for us" or "What are your strengths" or "Tell me about a situation where ...". Not every company has a blog, open source projects and many of them have no public products and are privately held. So, I can see the job description and the website. I don't know if you are an HR person or not. No offense. I'm not against them, but have very very very bad experience with them.