I got this purely out of curiosity to see what all the hype was about. I installed a Solid Steel block because the properties and descriptions of the Brass ones weren't to my liking.
Here is the stock block
And here is a comparison shot of the two. Its quite a significant size difference and the stock block weighs less than 1/4 of the weight of the SS one
And finally here are a couple of pictures of the block installed on the trem.
And finally a picture of it installed in the guitar.
This was marketed by Guitar Fetish as:
The result is a total transformation of your guitar for UNDER TWENTY BUCKS!! Come on!! Sustain is increased noticeably, tone is like NIGHT AND DAY, even tuning stability is just a hair better. You can't NOT buy this!!
After installing it and playing for just a few minutes I agree entirely. They missed out a few points though. The low end is punchier and the midrange is a lot snappier with a crisp high end. In general the tone is a lot more full and percussive.
The marketing gumph is slightly incorrect though as the block itself is actually $21.95! But still for the tonal increase you really cant argue and you would be a mentalist to not at least try it at the above price.