This tool actually works!
If you've never used one of these you have to have patience. I was almost at the point of giving up so I watched the video once more. The video is a good piece of information and helps a lot.
It took me about an hour to figure this out but my next one will be much quicker. I changed out the sights on my Kimber target II and have two more Kimbers that need better sights. The front sight was a little more difficult but again, with patience it will work. The front sight was stubborn and the metal on the tool did roll a little but I took a file and fixed it. For replacing the Kimber sights I think the mover needs to be a little smaller on the back side or the pusher hands need to be a little longer. This would keep the slide from being hit, it is very close to the slide and if you are not paying attention you will damage the finish on your slide.
Over all the tool works, I suggest putting the tool in a vise and using an extension to provide more leverage for turning.
I also give it 41/2 out of 5 stars.
(Posted on 4/30/10)

I tried using this tool to adjust the night sights on my glock. I had to make constant adjustments to the tool. The slide kept twisting and moving no matter how tight it was made. There is a protective coating on the parts that hold the slide. This material ripped almost instantly. This caused a pretty nasty mark in my slide. I recomend staying away from this tool. (Posted on 4/28/10)

This is the best sight adjustment tool ever! I am a pistolsmith and have about $1000 tied up in sight movers/installers, etc. I bought the Kaiser Uni-tool 200L and was very happy with its performance! The only problem I have had is removing a Kimber dovetail front sight. The sight wouldn't budge and began to cut into the areas of contact on the push-block. It seems like metal used in the push-block is soft and can be damaged on a stubborn sight. I'll take this issue up with the manufacturer.

I'll give it 41/2 out of 5! The price is reasonable and it works as advertised. It'll save you a ton of money on sight tools and damaged sights. (Posted on 1/3/10)