It certainly won't eat a full year of your life, which an MSc certainly will,
The MSc at City was set up at the instigation of GAPAN and is part-time and can be spread over 3 years. The taught modules are intensive 3-day units specifically designed to fit a pilot's roster. There are over 400 students from all over the World from Training Captains to First Officers, ATCOs, engineers, etc.