The swap out was quick and easy so I thought I'd post a few pics if any of y'all wanted to try this.
My opinion? It's LOUD. Probably about twice as loud as the stock horn. The pitch is the same but now your 'meepmeep' will scare someone next to you. I've seen it listed as anywhere from 100-116db on the web. No idea what the stock horn is rated at. Again, it's no Nautilus by any means but for $6 it's a good alternative.
A special thanks to Smorris for answering a few of my electrical questions!
The finished install.
All wired up. I didn't pay attention when I took it apart unfortunately .
I don't know if it really matters but I wired it with the GRAY wire on the top terminal
and the BLACK on the bottom terminal, it works just fine that way.
You'll have to loosen this 8mm bolt that holds the fuse bracket and the horn bracket underneath.
Hold on to it, you don't want to go fishing for it down in the innards of the legshield.
The back view. Wolo on the left, stock horn on the right.
The front view. As you can see they're very similar. The Wolo (left) is actually just a little smaller than the stock horn.