I work nights and so does hubby. It has messed up my sleep pattern and doubtful if I will ever be a normal sleeper again. But it helps my sewing/quitling time. I can stay up until the wee hours of the morning and get a lot done. I was off last night and stayed up until 1 am. I got all my fabric cut for my spool quilt and even got 14 block made. And only one goof up. And that was because I was watching a Deadliest Catch re-run and not what I was doing. LOL!!