yea, MD rules (just as corona ;))
yep, I let it for 12 hours, but I think it was completely not necessary in such simple scene, I just let render during the night.
As for MD, it can be use by all kind of 3d artists, also by character modellers, Clo has only few features more that are helpful when you are going to physically sew clothes.
Btw I know there is an Octane plugin for Clo3d, maybe there is a chance for Corona plugin for MD, dear Administrator? :D It might be a nice niche, in my opinion, because I see there is a lot of people who can create nice clothes but are not able to render it well in some external softwares and corona is very simple in use and userfriendly :)