Instruct: Classify a given review into positive or negative sentiment.
Query: It works!

What can I say, it's a magnifying glass; it works pretty much as expected.Seriously though, I do think it's a good thing to purchase if you're in the market for a diamond. Considering the thousands of dollars a diamond cost, it's a small investment. Of course the jeweler should have one to borrow, but it really helps to get comfortable and experienced with a loup before shopping (not to mention that it's pretty cool to examine all sorts of ordinary items up close). Pulling out your own loup also tells the seller that you're a serious and educated buyer. Just remember to hold it correctly (braced against the face), or you'll look like a poser...