Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A very disappointing product in comparison with other types

I purchased a Black & Decker Single Serve Coffee Brewing System because I trusted the Black & Decker brand. Unfortunately, I was very disappointed. I have owned single serve coffee machines made by Mr. Coffee and Melitta, so I have actual basis for comparison. First, the flavor of coffee produced by this machine is unsatisfactory in comparison with that of other machines; I suspect that either the water is either not being pressurized sufficiently or is not heated sufficiently. Secondly, the machine is slightly awkward to use in relation to the other brands. Apart from these issues, however, the machine has an excellent form factor, price and brewing time.