Top positive review
Great for what I was looking for
Reviewed in the United States on August 25, 2015
I bought these for use in an office environment for various "time checks" and they are both big enough to be seen and the colors are distinctive enough so you don't need to look at the top to tell what duration you are using from the other side of a conference room (30 feet). You can't quite resolve time remaining from far away, and these "suffer" the usual issues of sand timers (cant reset them quickly. they don't alarm when they are done, and it is difficult to tell how much time is remaining by look) but I was looking for these features, so I got what I was expecting :-)
They seem pretty durable (they have survived drops from 3-4 feet onto carpeted concrete flooring)
As for some faults (the only reasons these are 5/5 stars)
One of mine (the 1min) has end caps that aren't "aligned" (in that laying the timer on its side has one end resting on an edge while the other is resting on a side) And the end caps are "glued tight" so I don't want to risk a diy fix. This is really the only reason I gave this 4/5
The 1 min timer is 50 seconds and the 2 min timer is 2:09. I didn't expect them to be super accurate, but the 3, 5 and 10 min timers are all pretty spot on. This doesn't impact my needs, but it might be useful info for others.