Sounds great, but a bit expensive.
As advertised, this needs a little work: it's (fortunately of course) a little wider than a regular nut-slot on a Strat neck, so you need to make it fit properly. I used waterproof sandpaper to get it correct, works fine :-)
The string slots are a little narrow (Yngwie plays fairly thin strings 008 - 046), so these need to be adjusted to suit your own preference.
All in all - it sounds great and fits very well on a vintage (style) Strat, but it is a bit pricey.
Then again: it's brass so it should pretty much last forever.