Review on Hourglass Yueton Sandglass Management Intensity by Bernadette Hardy

I give 4 stars because the 10 minute timer keeps getting stuck. You can barely see the 10 minute stream as is, so we had to hold it up to the light to see it. We can click on it to make it work again, but it's unreasonable to expect someone to sit and stare at it for 10 minutes to make sure it's still leaking. The 5 minutes stuck for us a couple of times. The 30 second, 1 minute, 2 minute, and 3 minute timers are fairly accurate, falling within a few seconds of the displayed time. The 5 minute timer is also within a few seconds unless it's stuck.