It seems to be more intuitive and easier to use, for sure (compared to SubMOA on iPhone).
One thing I do NOT like about SubMOA (besides having a bunch of mystery buttons with little to no guidance on how to use them) is that it will show group size in mil when units are set to mil, but still shows group distance to POA in inches rather than mils. Ballistic X shows that value in mils or MOA depending which it's set to; that's a lot more useful for a mil/mil scope IMO.