I've been working, along with the folks at Primary Arms and Trijicon, for over a year to make an idea I had while using the original TA44 years ago happen. IMO, the most limiting factor with the original TA44 is the reticle; at distance it was very difficult to engage targets quickly but the new ACSS version fixes that. In my review below I state that I'd only taken mine out to 330/350 yards but last week I had a chance to shoot it at 500 and it was spot on there as well.
Pros:
-lightweight
-durable
-uber clear glass
-reticle greatly increases capability of the optic
-common mounts available
-free shipping and a free mount when you use the links in the video description
-red and green reticles available currently
-high and low (for AKs, ARX100s, etc...) mounting options available
-folks with astigmatism won't have issues with it like they do with red dots
Cons:
-cost
Full review:

Trijicon TA44 1.5x ACOG With ACSS Reticle Review (HD)