Yes I do. Alas, I confess my use of it is a bit haphazard. Since Canon A1s, Bronicas and Perkeos don't embed "EXIF" data, it is nice to have something to refer to after the film is developed. In theory at least, one can refine one's process that way. Sometimes it's also useful to record information about the subject that seems to vaporize from memory in an alarmingly short time after the photo sessions.
(First the short term memory goes, then ... I forget what happens after that.)