Mine arrived on Friday last week - using it at work now.
Had to buy 2 new USB-C to HDMI dongles ($75 x 2) to connect them to my 2 external displays.
Otherwise, all working like the previous model - I can imagine that it is a bit faster.
The touchbar I have not even used at all except to login using TouchID.
I’m in the middle of selling my mid-2012 rMBP now.
Anyone else who pre-ordered received their MBPs?