I'm also missing a key from my Metropolis set and contacted them about it, their response was a noncommittal -oh, okay- and have gone silent about it. Sent another email at the two months mark and have not heard back. Three months now since I received a flawed set, and exactly two years since I initially paid ($240) for Metropolis. Horrible customer service in my opinion.

BTW, anyone out there missing a 4$ and has an extra 3#, lets swap!