Yes, but I don't usually use it.

It's a good thing to do, especially if you're trying to learn something. My shooting style can often be quite fast-paced and I find it difficult to keep track sometimes. I usually have a pretty good memory though, and can write enough information after finishing the roll to be useful to me afterwards. Not that that's what I would recommend you do...

If you're systematic about it I think you could learn a lot from it.