So, I saw the other review for this product and it seemed really middle of the road. I was left in the same place I started: Uncertain of purchase. I saw the cat toy at a local Walgreens on sale but I had not read much about it and I was wondering if anyone else has had experience with it? Would it be worth the ten dollar investment or am I better off with a stick/string scenario? I was pretty concerned about having to purchase batteries over and over again. Thoughts?