EpicWar has a lot of con's, but also some pro's.
The site is filled with stolen maps which will not get removed and extremely low-quality maps that were made in 10 seconds.
Especially the stealing-part is a major downside, as I can't stand people who do that.
However, EpicWar keeps all maps intact, that means that you can find some very old classics there, which would be removed at other sites because they don't function properly anymore (v1.24) or because they basically suck, quality-wise.
There's no update-button either, so if you want to check older versions of the map (for whatever reasons you may have), that's perfectly possible.
It's pretty much like any free image uploading site (imageshack, photobucket), whereas thw and wc3c are more like devientart.
imageshack and photobucket contain a lot of crap, but everyone can use it, always.
You don't go to imageshack/photobucket if you want to view some real art, neither do you use devientart to dump your tests on (or maybe you do, that also happens on the hive... until those resources gets rejected

)