I have an atlas and a modular evolution. I bought the ME hoping to replace my atlas, because I like the idea of being able to carry the longer legs with on the mountain. You can put your pack under the back of the gun with the long legs on the front and get a pretty solid setup.
The atlas is a higher build quality. I haven't been as happy as I had hoped with the ME. There is definitely more slop and movement in the ME legs. The finish has also worn off of a lot of the metal parts after only around 6 days in the field.
Since the leg extensions are on the bottom of the ME leg, they get snowy when you set your rifle down. Quite often they freeze and it's a little bit of a production to get the legs to extend - as I found out this weekend while sneaking up on some elk. Maybe some Vaseline or something would help.
The other thing with the ME that is a little scary is that at some point this past weekend I was doing something (don't remember what exactly) and the entire leg came off in my hand. This is alarming, because I pass the rifle back and forth a lot to my wife and when she hands the gun back to me, I typically grab it by the bipod legs - a habit that I need to break.
Wish I could report better news about the ME and that atlas had extension legs. I do love the idea of the ME and will probably be keeping on my rifle for hunting this weekend as well, despite the things I mentioned.