Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worthless controller!!!

My wife purchased this for me for Christmas and was really excited for me to use it. Plugged it in, started with the 80's version of Guitar Hero, notes were slightly choppy to play (response time not accurate) but not horrible... accumulated my star power and with much effort, eventually got the Star Power to kick in. Thought maybe it's because of the version of Guitar Hero that made the star power difficult to engage... slapped the first one in and same problem. This time, when star power was accumulated, I literally took the guitar off and swung it around furiously in an attempt to activate my star power... eventually kicked in after I threw it on my couch (damn controller was lucky it was the couch and not the wall!). I'm 31 and LOVE playing the Guitar Hero franchise, however, this is the biggest piece of junk I have ever purchased... star power is a must and with the amount of effort needed to engage, it's not even worth the hassle. Stay away from this product!