Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Having problem all the time

My first I-Robot worked two month leaving lots of water behind on my wooden floor. They exchanged. My second I-Robot did a great job only for few weeks, so I have to return again and get a new one. Now I have third I-Robot which was taking 12 (!) hours to recharge and after using 5 times stop working. I have to call the company again, go to post office for sending it back...I am getting tired and just want to throw away and forget about this.