I own a Zenith Retrotimer with the same deployant design, it is easy to get used to and causes no problems in my opinion. Zenith just do some things a little differently I guess. Another looking watch from a fantastic brand!
I agree chintu, this is totally unacceptable and really disappointing for this brand and the premium they charge. Not the first example on PuristPro either of really poor adhesive-related quality issues with JLC.
I actually bought one, am wearing as I type this. Great watch! Quality is outstanding, very cool without being attention-seeking. Zenith not that well known in my country, so pretty happy about that too.