Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Concept is great but the design is poor.

This product concept is a great idea; however, I believe that that both the software and hardware were designed by inexperienced engineers. I am sorry if this is not helpful, I just don't want to waste my time discussing all of this product's shortcomings. The biggest complaint though was that to even change the countdown time it is far too tedious and requires you to step through several layers in the menu to make even simple changes. In the end, we simply never wanted to go through the trouble required to use this product and it sat on a a shelf until I finally sold it on e-bay for one third what I paid for it.