It's the follow on improved version of the Red One. It is smaller, shoots 5k images, and dollar for dollar one of the best values in digital cameras. It is currently being used on multiple movies and its RAW files are very nice.
It also stamps all footage with its serial number.
This camera is the next evolution of the RED ONE camera, which shot 4K resolution... the EPIC-M shoots 5K resolution. 5K resolution is huge. Take your 1920x1080 monitor and multiply by 5.
Because of this resolution, it is compared (favorably) to film in many ways, something that digital hasn't been able to do yet.
Also, RED has a very passionate userbase, very similar to Apple.
Right... but when you're comparing it as a measure of area it's actually a greater then 5x difference...
5120x2700 (5K) = 13,824,000
1920x1080 = 2,073,600
Roughly a 6.5x larger resolution then your 1920x1080 monitor.
It falls into a price range that doesn't exist outside of that company's products. Auxiliary products like lenses and stuff is pretty much the same price (since they aren't produced by that company).