Not good enough.
It has no instructions so I've been fiddling with it all day and from what I can tell you cannot tell it you've urinated without telling it you drank. You also can't drink without telling it you urinated. I don't drink every time I urinate nor do I urinate every time I drink. Therefore, the log is uselessly inacurate. It also allows you to track the urgency of your need and relative volume of urine. However, if you urinate more than once in a time frame with different urgency and volume... well... you have to change the time frame of the first urination to NOT include the second one then start another entry. God forbid you drank two differnt things in a time frame, too. Basically. it's useless. They have the right idea, but absolutely no execution. I'm sad I bought it.