Mirror is great. As is Solidfiles, Zippy, Tusfiles, Hugefiles (hell, even Kingfiles if you have half a brain cell and know how to use the site).
Mega (and Oboom), however, are steaming piles of excrement if you have an older OS that won't allow you to update your browser. We're talking transferring a file from point A to point B. No need to do what they did. And I'm not the only person who b!tches about it. Mediafree is even worse.