I don't know about the MD, after seeing how Pierre had to wrap his Interchange like a Klondike Bar in order to reach a decent insulation rating, I'd keep my eyes on the Sprints brother!!!! I do know that M&R will send out a meter so that folks using other brands can see what they are actually burning in gas vs what the Sprints burn. I don't think I've ever met an unhappy Sprint owner and from what I understand they are about to launch a whole new version with updated features, that I would assume add even more efficiency. I think, when looking at the price tag of a dryer, you should also look at it's actual production rate and gas consumption. If a dryer costs a few more grand than the other and you have that dryer for 10+ years, the added cost of an old outdated banger or a lesser price tag'd model that's not as efficient will out weigh that initial price tag. Just the way I see it, but I've spoke to more than one shop that wish they would have pony'd up a couple more grand for a Sprint.