Instruct: Classify Amazon reviews into positive or negative sentiment
Query: great unit while it works

The GL 6+ worked fine from March to November. It quit producing any hot water for Thankgiving. Amazon is not involved in returns for warranty. That's OK, but Bosch the maker has the worst Customer Service phone service I have ever encountered. After 30 minutes on the worst hold screeching music I briefly talked to a human, and was cut off after less than a minute. Maybe the email I sent them will recieve a better treatment. My take on such things is buy the unit use it, and if works for 6 months count your blessings, and be prepared to throw the unit in the trash - forget stupid claims of warranties that require an act of God to be honored.