Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This flash unit is great.

I bought this flash for use on my Nikon D200 and it works better than I had hoped. You can fine tune it for your own personal liking and it has more options than I am currently smart enough to use. But don't worry, you don't have to be a super camera geek to get great results right off the bat. This thing has great "reach" as it actually zooms right along with your lens to pinpoint your subject. It's just audible enough to let you know it's doing that. I'm definitely glad I bought this thing. MUCH better than the small pop-up flash.