Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A Must For The Camera Bag

My grandson wanted a len's brush for his Nikon so while I was ordering I purchase one for myself. Great addition to my camera bag. When I got to looking at my lens everyone one of the them had some dust on them and this little pen did a great job. Thus far my pen is holing up well and I expect a long term use out of it. The cost was bargain for this product.