I would like to take part of such kind of interview, not necessarily to take the job, but to experience an honest and objective evaluation from an experienced developer. Being a student and not actively looking for a job it's hard for me to self evaluate. Hitting roadblocks I don't know if the problem is genuinely hard to solve or I just bit more than I could chew
If you are a student, this sounds like a great project to do for a class: set up a service where two coders can get randomly paired up to program an exercise and then they can later evaluate each other!