I have one on my C7A1 clone. I like it alot. My scope is very old, and was one of the prototypes the Canadians used in testing. The reticle is completely different than the standard one, because it was a test model. That information came from ELCAN themselves.
Anyway, mine has a fourth gen mount on it, and I've never had any problem. The early mounts blew, and troops had to shim them with papaer, etc to keep them from moving around. The adjustments are on the mount, not the scope, so on the early mounts, the adjustments wore and became loose.
For me as a civillian, where I'm not having to change rifles, scopes, nor rezero every year from a mechanical zero (rather than from my personal setting), I honestly haven't even touched the adjustments after the first trip to the range.
I zeroed it, and haven't had to mess with it since. I've had the scope off several times, and it's returned to zero each time. On a .223, I don't see much need to fiddle with all the adjustments anyway. Sorta like A2 sights. Yeah, you can adjust all sorts of things, but rarely do I ever do it anyway.
So while my fourth-gen scope mount supposedly took care of any problems, I really don't use it in a way to cause the main problem of wearing out the adjustments.
The scope itself is rugged as all get-out. With the adjustments on the mount, the scope is basically just a sealed tube with glass and prisims in it. The reticle is etched on and doesn't have to move, as you move the whole tube to zero. So you don't get weird things like the cross-hairs sitting off to the side of the FOV, etc.
What I like most about it is the scope really pulls in light. I compared it to some Russian gen one night vision, and the ELCAN was actually far better at seeing in the dark than the night vision scope. When it gets crappy outside, like dark, snowing, raining, etc. you still get a nice clear, crisp image.
I would assume as old as my set-up is (about 8 years old) that they have even newer generation mounts. I wouldn't hesitate to buy another, other than choking at the price, but you get what you pay for in optics.