I am going to echo much of what II has posted as I took a trip on the new line today.
My trip started at Paddington at 7.20am and got me back there at 9.45am. Assuming the initial rush of enthusiasts has died down somewhat the trains were all busy but not uncomfortably so.

Throughout signage is good and there are plenty of staff on hand to guide people through the system and answer questions.
As many have said, the first thing that strikes you is the space. High ceilings, well lit and spacious concourses as soon as you enter the new station at Paddington.



Although not officially part of the Underground network, the trains do of course travel below the surface but there is none of the screeching, uneven ride or stuffy interiors associated with the tube. We moved swiftly beneath the city before emerging to the east and the current terminus at Abbey Wood.
I will bet not many had heard of Abbey Wood until recently - other than it is the first station alphabetically in pick lists on journey planners. Unlike Paddington where terminating trains go out to Westbourne Park before returning to form an eastbound service, trains here use one of two platforms alternately.


With such a frequent service a departure board is almost superfluous, so much so that no one seemed to notice it was more than ten minutes out of date

All the stations are understandably clean but their exteriors do blend in well with their surroundings

All the trains I caught ran on time and my journey to Abbey Wood and back (exiting at two stations) reached the daily cap of £11 on my
Oyster▸ card. Very hard to criticise on the basis of one round trip and the only thing I did notice was on occasions the platform doors opened momentarily after the train doors and I did see a couple of people bump into the second set of doors as they started to exit.

The big plus for me is the new areas of London it opens up with an easy journey from Paddington. I had a walk around the site of the old Woolwich Arsenal - where my grandfather worked - the Woolwich pier and Thames Clippers and Canary Wharf. All within a couple of hours of leaving Swindon.





