I have 5 bikes of my own, and I still use Citibike. It is just convenient when leaving the office as I don't ride in more than once or twice a week on my own bike. In fact, I may just hop on one now.

As for dynamo lighting, I always think I have one of the few dynamo lights on my commuter bike until I realize that Citibike is probably the largest user of dynamo hubs in the country. I never liked the 5 LED front lights, and the new ones are better. The last two new version bikes I used though were really squeaky, and I see a lot of people will select them first.