Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Excellent!

Don't know how people lived before Sharpies were invented! Mine are multi-use, but I mostly use them for labeling envelopes. I send a lot of parcels out and using a pen to label them just doesn't seem the ink stands out enough so I use Sharpies. Don't know what else to add except that I buy large quantities of them and keep them all around the house.