Fortunately I didn't have to go through it this morning, but
my wife did. Here's what she said - her first two points are
not actually about the new station, but her last point is
interesting.

"Today's journey was the usual fiasco. A train broke down at
St Pancras so we were stuck for 25 minutes at Cricklewood.

At King's Cross all the machines stopped accepting tickets and
would only accept Oyster cards. I tried mine on 3 machines before
I gave up so by the time I got to Piccadilly Circus it failed in the
reader there too!

New definition of Hell - Thameslink, Midland Mainline and a Eurostar
from Paris all arriving at the same time!!!!"
--
Garry Smith