Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good idea, but...

I think this is a wonderful idea. However, my cats are older, 10 and up, and I still haven't convinced them in over a month that they want to use it. I am still fighting the good fight, but don't expect to just replace your old box one day and be done with it. In my opinion, CatGenie should consider some type of attractant to add to the litter that would not harm the product.