I haven't had any issues with broken bodies on my Medicom's yet, but missing parts and broken costumes I've had a few. But then again, all my figures are still in the box, only taken out to check if they are ok... Perhaps if I would pose them a lot, they would also break.
A lot of these issues were somehow easier to comprehend, if these figures were sold for what they are worth. My major complaint about Medicom is that they are to expensive in the first place, and that there's a company like SSC who thinks they must sell these figure for an even higher price. That's wrong. One should think that by now, both Medicom and Sideshow must know that these figures are not worth the price. If they were, they wouldn't break as often as they do to begin with. But yes, as long as we keep on buying these, they will keep on selling. That's why I stoped buying these from SSC, because they want to much money for them.