I haven't used the mash run but I do love Midwest Supplies. I generally go there for my wine and equipment needs. I then go to Northern Brewer to get beer ingredients.
Do a search for 10 gallon Rubbermaid Mash tun. They are really easy to make and way cheaper than what Midwest supplies charges for them.
My wife got me the Midwest 10 gallon with false bottom for Father's Day. Took a bit as they were back ordered, but I'm happy with it. Have only brewed twice with it so far, but holds temp well and no stuck sparges or problems at all