Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Failing fast.

I bought oneof tese keboads through Del, and a annn example of hw badly it's mesig p, i won't corc this as IIIIII TYPE> I'm abot 2 ft from the computer with the receiverplugged in, and this is the result: missed keys, double typing or more, and my mouse is currently flying around the screen like a schizonphrenic bird. It seem to be improving, but this happens all the time now. It worked great at first, and now it seems to be failing after less than 6 months of use. There doesn't appear to be any way to open this to clean the trackball area, something even optical mice needdone every once and a while. I'm getting tired of it nd thinking of switching back to a wired keyboard.Yes, that is liteally the result as I tried to type my first sentence.