Instruct: Classify a given Amazon review as either positive or negative.
Query: After two units, I gave up

I have the original Roomba, and thought this would be a great update to a product I loved. The idea of the Scheduler sounded great so that it would automatically clean every day.The first unit I purchased worked for about a month. Disappointed, I returned it and brought home another unit. It died within a month, too. All the usual troubleshooting did not work.I returned the Scheduler and am back to my original (manual) Roomba.