Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Works well with some effort and care

The sensor of my Canon XSi was showing spots, particularly with blue sky backgrounds. It took me a few passes, but using this Sensorclear, I was able to get all of the spots off. It's not foolproof and you have to look very carefully to make sure you get all of the spots off, but in the end, it worked well and got the job done.