I've never had 1 yet, but i do apply ballistic and ranging reticles for downrange elevation, windage and ranging all the time. The reticles are designed for certain groups of cartridges that give similar downrange ballistics just like many other ballistic reticles out there, and can be easily adapted to other trajectories if u need it to, but this takes applying ballistics programs, actual shooting, and manipulating ballistics programs to get the reticle to fit the trajectory.
I really like their windage system, and it should be repeatable if it's truly designed like they say it is.
The reticle rangefinding system is better than guessing, and will help for ranges to about 400-maybe 500 with a degree of consistency. All reticle-rangefinding is based on the theory of equal triangles, and can be quantified by a simple adaptation of the mil-ranging formula. Beyond 500+/- reticle rangefinding becomes too inconsistent to depend on really. Depending on magnification of scope, size of reticle subtension, how steady the scope is when ranging, variation in size of tgt. (even as little as 1") may change the range by 50 yds. or more. Even the MOA scale itself introduces some error in the calcs. when using tgt. sizes in inches. BUT IT'S BETTER THAN GUESSING!! so...
It's a great concept in theory---IF the mechanics/optics are up to par i'd buy 1.