Be wary. Not as great as it first appears.
My watch gained about 30 seconds each week which I considered to be unacceptable. Research suggests that digital quartz watches should be accurate to +/- 1 second per day. When I complained, the manufacturer said the following
"This amount of time is not really a warranty issue as all time pieces loose time. It will more than likely happen again if you have another watch."
I sent it back and got a full refund.
You also need to know that switching from normal time to countdown is very awkward as you have to press two small buttons simultaneously.
I wouldn't buy one of these again