Instruct: Classify Amazon reviews into positive or negative sentiment
Query: DONT BUY THIS!!

THESE KEYBOARDS AND ESPECIALLY THE MOUSE HAS MAJOR CONNECTIVITY PROBLEMS!....MONTHS WITH MICROSOFT CUSTOMER SUPPORT AND NO FIX!.......THESE CONSTANTLY LOSE CONNECTION AND ACT ERRATICALLY...I HAD TO SEND BACK TO MICROSOFT FOR REPLACEMENT, BUT HAVE NO FAITH IN THE RESULTS.....I HOOKED BACK UP MY $20 LOGITECH COMBO AND HAVE NO PROBLEMS .....WHAT A COMPLETE WASTE OF TIME!!