This product was a lifesaver for me. I had one of those babies who didn't sleep and who nursed every hour around the clock. I spent those first few months of motherhood a sleep-deprived zombie. Without the Itzbeen life would have been a lot more difficult.
This is a great little tool that lets you keep track of when you've fed the baby, when the baby went to sleep, when the baby had its diaper changed, when it had its medicine, etc. There is a timer that counts up, and you can set it to light up after a certain time period has passed for each thing. For example, in the hospital I was told I had to feed the baby every three hours, and to change the baby every two hours. I was able to keep track of both these things despite my room not having a clock and having had removed all jewelry including my watch. To be clear, the button lights up for each activity, so if you wake in the middle of the night, one quick glance tells you whether it's time to feed the baby or give the baby medicine, etc. You hit the button once to say you've done it, and it starts counting up again.
There is also a little light on it which is helpful if you need to see something but don't want to wake your baby by turning the room lights on.
I've given several of these away as shower gifts and they were always well received. I know there are apps available that do this stuff, but this one was so simple and easy to use that I prefer it to something I have to use on my phone. Plus, you know if you pick up your phone in the middle of the night you're going to get sidetracked when you should be sleeping.
As an additional vouch for the quality of this little helper, It once slipped off my belt (it has a clip) and into the bath I was pouring. Once it dried out it worked just as well as it ever had.