We found it completely useless. In fact, we never used it. We used an old-fashioned pen and paper and a chart I created based on the chart they used at the hospital.
not a stm but... i didn't even know this existed but it seems so smart. i'm all about tracking in excel and will probably do that (i do like me some pretty charts), but for reminding me when it's time to feed/change/whatever again, i think it's neat. just added it to my registry.
edit: i have a blackberry, so i doubt there's an app (but i'll check). but even so, when i go back to work and my partner is home for several months, i couldn't rely on my phone. but the app idea seems better than buying a gadget that's just a fancy timer.