Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: C1500 - after 800 cups - it has problems!

I'm on my second C1500. My mother has the same unit and is getting ready to return it to the store after a bad customer support experience with Capresso Phone Support. She's on #2 going to #3! A store manager where I bought my unit has the same problem...After about 800 cups, the whole bean coffee comes out very weak. The tamper quits working.The only thing that works is the "pre-ground" method. Very disappointing. Funny that we all have had the same bad experience.Nice overall look and simple controls. But one must question the mechanics of this system. Not reliable.