-Shifting from say 52/23 to 36/17 aka the front shift and double rear is a bit strange. Its kind of Campy like more than Shimano in that you have to hold the rear lever slightly longer. Took a bit of getting used to and definitely not as fast as Shimano.
-The shift action to me feels a lot like Campy with the clunks.
-Micro adjustment took a bit of fine tuning, but was really, really easy.
-Took a bit of time to get the angle of the levers adjusted right. Not the same as the Sram I have ridden in the past. Levers themselves feel a bit thinner to grip than 9000 and Red (could be my own perception). Otherwise they feel much like levers should.
-Very much like 9070/small to grip. Coming from 9000 the levers have a shorter effective reach from end to end. what I mean is if you were to measure say 3 inches from the hood where it meets the bar to where it curves up at the front of the "knob", 9000 levers seem about 5mm longer. A bit annoying for those very particular about their fit but probably not a big deal.
-I don't think the shifting while braking is as good as some reviewers claim. After playing with reach adjustment its something I really miss coming from Shimano.
-To me the rear is slower and noisier coming up the cassette rather than going down it.
-Tactile feedbacks and clicks feel great.
Lots more miles to come but overall no real complaints about the group other than the sheer size of the derailleurs/batteries, but that's pretty minor in the scheme of things.