I think Joe Preston is the Ronnie Wood (see my post on the Birds) of a later generation. And by that I mean this guy has played in so many bands that I love. Let's take a look:
-Men's Recovery Project
-High on Fire
-Fucking Harvey Milk
And there's still a million other projects that were enhanced by Mr. Preston's participation. Now, after see that list, is there really any reason why you wouldn't download this (assuming you don't already have it).