Instruct: Classify a given review into positive or negative sentiment.
Query: Work as advertised, but expensive and don't last long...

I got burned going with some 3rd-party ink refills on an old Canon printer in the past, so I always buy the Canon-branded stuff now. It definitely gets the job done - I primarily just use it to print documents when needed, and recipes for my wife in the kitchen; only a hand-full of photos here and there. However, these things are pricey (after all - it's no secret these printer companies make all their profit off the ink!), and they don't really last very long, even with infrequent use. It's often times more cost effective to buy a new printer that's on special than it is to buy ink refills for an older model. So: 4 stars for the quality of the product, with the caveat that it's way over-priced.