I applied online. The process took 1 week. I interviewed at AlphaSights (London, England) in Jul 2013
Interview
I applied through the Milkround, and was asked to complete 4 further questions online along with a recorded interview. I found the recorded interview quite awkward - definitely worth practicing beforehand. Overall a good experience, however I get the impression that they are constantly "hiring", making the process quite competitive (not necessarily a bad thing).
A hirevue completed online followed by a behavioral interview over zoom with an HR rep. It was fairly standard behavioral questions and they ask you to describe what the company does.
Very smooth and takes place quickly after application and with a real person which is nice. The questions aim to test your understanding of the work you will be doing and the competitive landscape of the industry.
Process had three rounds: screener, case study, and final, hour long in-depth interview. The recruiter was very transparent and supportive throughout the process and let you know what to expect with each round.