Con: Batteries - Pros: Great fun, grand kids love it - I call it Wiskers my cat, just to screw with my grand kids and have them argue with me. My grand kid when they come over go right to him. Adults, when they come over, can't keep their eyes off him, I turn him on and move him around the house when they are'nt looking.
It's a fun lil time waster at least for a while. Just don't use it too much and come back to it later or it'll probably get old real quick as there's not a lot to it. But you do get a lot of bang for your buck with all the roaring and movement.