QC could be an issue these days. So far, I've been lucky.
Regardless the 3 cases MDT come with, I just received a Shure zip case that is spacious and sturdy. It's the case that normally comes with the SE535's. Pricey, but a small price to keep my IEM's in shape if in pocket or bag.
I sported the MDT today on the way back from work. I haven't worn an earring or two ever, but I'm digging the glint of gold seen with these in-ears. Here's the kind of clothes I need to get to be totally into the MDT's, lol.