Despite the extensive interview process, this was a refreshing and educational experience. Based on some of the other reviews, I originally had my doubts about what I was undertaking, but as I turned in each sample, the feedback given was encouraging and provided concrete steps for improvement. Unlike other reviewers, I had no trouble grasping Groupon voice after a few samples and watching the Groupon Academy video (I am not from Chicago), which clearly outlined the process. If you follow the listed steps, you will at least achieve the format.
The recruiter that contacted me was professional, intelligent, and offered helpful advice. Additionally, each sample was critiqued promptly the next day. I completed 3 samples before I had a phone interview, and had one followup sample before I was offered a job, which I accepted.
Overall, as long as you follow their instructions and take their critique seriously then you will come out with a positive experience.