Yes, it's a lot of fun if you've got a magnanimous heart and are ready to forgive the game its many flaws.
As for the second question, I did meet David Martinez in the game... in a sense, at least. Here's a screencap to prove my words:
So yes, shortly after the Edgerunners anime got released, CDP Red made a small update which added a short quest involving David. Nothing too exciting but still an interesting experience of interaction between two different media. If you liked the anime show, I cautiously recommend the Cyberpunkgame, too. Just wait for a sale, the Reds don't deserve people paying the full price.
Wish there was something more about Lucy, though. I mean, the animation studio upheld its reputation on their cyber themes to a point it's almost like Akudama Drive all over. But can forgive them with the good story, opening and closing, however.