I first have been trying the latest version of Magic Lantern V2.3 on the 5D2 for a week before delivering it to its new owner and it has impressed me. All the features I wish I had on the 5D2 is now in this firmware, including the intervalometer, zebra, focus peaking and HDR mode. While the sensor performance doesn't even get close to the 5D3, it does certainly breath new life into the 5D2 (which is discontinued) and other Canon DSLR. Best of all, many of these new functions can be used in Photo mode as well, displaying it after the pic is taken.
The one feature I most look forward to using is the intervalometer, which Nikon users have. There's an exposure ramping mode where the timelapse will correct for exposure without turning night into day due to metering issues and there're even sunset/rise modes. Here's an example:
Another tool is the automatic HDR bracketing, which I'll just show the video below, what is possible:
I didn't have too much time but I can't wait for the 5D3 firmware to be available. I may just go get a 60D just to start shooting! Remember, this is still a hack so understand the risks! Enjoy