This caught my eye when I first saw it. One doubt I have is whether a complication like a Perpetual Calender should don a casing as casual and informal as this. Its probably personal preference and just me though.
Its nice but I guess I've somehow developed an impression of a Perpetual Calender encased in a precious metal of sorts and needing to come across in a more overstated manner than this particular Per cal. Not sure if I saw the right pics of the movements but if yes, it also seems like not much work went into the aesthetics and finish. I'm sure a lot of work did, it just didn't appear that way to me at least.
This would however be very nice for someone looking for an under the radar per cal.