I made this last week. It was so good! By far, one of the best I've ever had or made.
You can find the recipe here.
My only suggestion is to cut back on the salt. I wouldn't salt the roast before, it was a tad on the salty side.
Also, even if you're not a beer drinker, you have to trust me on this...you don't taste the beer.
I toasted the buns with provolone cheese first and then added the meat.
Make sure you use the juice to dip your sandwich in!!