Cat laser toy
I was disappointed in this item for two reasons. One, it is very flimsy and not much to it. Two, I walked into my local Walgreens and saw the exact same item (regular price) for $3.99 (I paid $5.99). The laser does work and does amuse the cats but definitely is not worth the $5.99 I paid. Buyer beware...

The good and the bad.
I ordered two. The one pictured in the ad arrived and so did one with the batteries stored inside of the laser. The one pictured works fine, but the one with the batteries already inside did not work at all. They both were the same exact product, but I guess the company realized that the batteries needed to be stored outside or they will die. This product uses what look like to be watch batteries. Which is a pain for finding replacement batteries when they die. Spend a little bit more and get some thing that uses AA or AAA batteries. You be happier in the end.

Vet recommended excellent entertainment, cheap product
This is one of the few 'toys' that truly fascinated our 2 cats, and kept them running and entertained for as long as we used it versus playing with other toys for a few minutes before getting bored. We've never seen them more mesmerized by this, especially when slowly moving across a wall or ceiling out of reach. After we'd stop, they'd be wide-eyed waiting for it to reappear, or searching for where the light went.

My wife was concerned this was causing a mental trauma. We spoke to a couple vets who said this is perfectly fine and stimulating entertainment both physically and mentally and not to worry.

The problem with this product is two-fold:
a) the batteries run out quite quickly, and they are not as easy or cheap to replace as other laser pointers that use rechargeable AA or even AAA batteries, so look for those instead.
b) the flimsy made item's button broke within a few months of light usage. cheap to replace the item, but you may replace it often.

Excellent!
This product is cheap and works great. My cat absolutely loves it! I use it everyday and the beam is very strong.

My Cat Says it is Purrfect
Watch Video Here: http://www.amazon.com/review/R2US34S87A7PH0 Although she is an indoor cat, my cat is a stalker. She loves to sit in the window and stalk birds or stalk the sunlight that comes through the window. She especially loves playing with her Laser Pet Toy. She can certainly use the exercise!