Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Good, but expensive

If you are paying sticker for these, they are an expensive set of highlighters. That said, they're also some of the best highlighters you can buy.The amount of fluid in the pen is substantially less than it could potentially hold. I'd imagine ink is cheap, so the only reason for this is to reduce the lifespan of the product forcing you to buy more.On the plus side, the pen highlights well, and consistently. The visible fluid reservoir allows you to see how much (or little) life the pen has left.I'd purchase again, especially if on sale.