Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Dimension 4600 Power Supply

Three months out of warranty and power supply failed. I see no reason to bother with their customer "support" given its notoriously poor quality.As for Dell in general, I decided never to purchase from them again when they failed to supply replacement packing slip to allow (...) my purchase of the 4600. Long story made short -- Dell has no integrity.