I have a 710 and 2 Militaries, one S30V and the other BG-42. I carry the S30V a lot, especially when I want a big sharp blade I don't have to pamper.
I haven't ever had a problem with the Millie's liner lock, and few problems with any other locks, either. I'm not as comfortable with axis locks, though, just don't like them. Nice toys, fun to flip open and closed, but not my style.
Other than that, the 710 is my favorite of all the axis folders I've owned or played with, and the only one I kept. Great comfortable secure handle and an excellent blade design. Although I generally prefer a wider blade, the 710 would be an exception to that for EDC carry.