Instruct: Classify a review into positive or negative sentiment.
Query: only good for a short time.

This unit is good for about a year then it will stop working, spins in circles as dust gets in to the sensor.Customer support will promise you they will send a code stick to fix the problem but I hope you don't mind waiting. I called them over a month ago, 4 phone calls and 3 emailes later and they still have not even shipped the part. I keep getting emails back stating "If this issue is not resolved to your satisfaction, you may reopen it with in the next 7 days".How can it be resolved if they never ship the part.BAD CUSTOMER SUPPORT. THEY PROMISE YOU EVERYTHING BUT DONT DELIVER.SPEND YOUR MONEY ON A GOOD VACUUM.