I'll stay away from the personal stuff and stick to shop topics such as the process of acquiring and installing the new Shimano Dura Ace Di2 9070 full group on my Specialized S-Works Allez Aerotech frameset - a modern classic. The opportunity to get the Di2 presented itself in June and over the next 2 months, various parts showed up in fits and starts. This was a bit frustrating but soon it became apparent that this was due to my "jumping the gun" and seeing that the folks at Shimano were not quite ready for a full group for external wiring to be sent out to a shop employee. Most new applications are internally routed in purpose-built frames that integrate the battery in a module in-frame or in the new seatpost that is the battery. Availability of a cohesive group with appropriate wire lengths are definitely better now and my experience will help with getting those things right for anyone interested in applying this excellent system to an external configuration.
It seemed like my bike got lighter and it did, coming from a full-group DA 7800, which was pretty nice. Another nice aspect is the improved braking of the new brake set, one or two fingertips are all that's needed - even for harder stopping. Very nice, noticeably better than the 7800. Switch acuatation with full-finger gloves has not been a problem. For anyone interested in this level of performance, I strongly recommend making this commitment - the proven durability and Shimano's commitment to high-level service seal this as a very worthy group.