Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Useful but ...

It's good for viewing a lot of slides quickly but not good for getting a really good view of your slides because the image in the box, while magnified, is still very small.Another thing - I don't know if it's just the one I got but I had to push down with an uncomfortable amount of pressure on the button and slide to get the light to go on. BUT to combat this what I did was open the back and insert a little piece of cardboard between the metal contact and the battery so that the light stays on all the time. It makes the viewer much, much easier to use.