I used to travel on the DLR every day when I used to work at South Quay, a couple of stops further on from Canary Wharf. It was pretty good, as long as you travelled early - there often seemed to be problems on the various branches during the main rush hour around 8-9 in the morning, and I'd often see colleagues come in and moan about the 'bloody Toy Town railway!"
. The trains are automated, which means that you can sit right at the front and see what was ahead (or behind) - small kids would often run straight to the front when they got on so they could pretend to drive the trains... and some not so small kids as well
.
I also used the regular trains to get from home in to London, and the line I was on wasn't too bad, but was becoming increasingly crowded. As for the underground, I gave up using that and used buses instead - at the times I was travelling, it wasn't too busy, and you got to see what was happening on the streets around you
.
Dave.