IMO the best chronograph at any price. You can spend twice as much and still not get half the quality as your 1815. Actually prefer it to the Datograph. Sacrilege to some, but don't need the date and the 1815 is so much more wearable with its reduced thickness.
Dial is as pure as it gets, and the movement is as bulletproof as it is elegant. Flyback is a bonus!
I thought these had been discontinued for the boutique edition though. Was it difficult to find?