Instruct: Classify a given Amazon review as either positive or negative.
Query: Nice glass! Orion quality all the way!

This is a great barlow. The glass and multicoated, optically clear, and works wonderfully with my Orion Highlight Plossls. If you don't have a Barlow, buy an Orion. Very good, metal barrel, two set screws for securely holding your valuable eyepieces... Nice glass!