Compared to the likes of the Northern and Jubilee lines, they're nowhere as loud to ride and despite them having so many people boarding, it never felt packed and got a seat on both trips. This was between 6 and 7pm.
It cut my usual time to travel to TCR by around 10 minutes and I didn't have to change at Waterloo and walk along the long travellator that runs between the Jubilee and the other tube lines.
What I would say is that it makes the Overground Class 378 units seem old already and the air con was struggling, while on the Elizabeth Line 345 units, there were no issues with air con even with people standing in the gangways.
I had to buy the collectors Oyster card!
