Sorry for the slow response...internet's been down for about a week now.
Anyways, I leave it on high all the time. I also buy the chuck roast. A little more fatty but has more flavor, I think.
I think I got this next "recipe" from this thread, but I'm not quite sure. Put a pack of onion soup mix on the bottom of the crockpot, put the roast on top then spoon a can of jellied cranberry sauce on top of the roast. OMG, was this good. I've made it twice within the last month and I CANNOT stand cranberry sauce.