One thing that Toolpath was invaluable for was in figuring out what was wrong with my post coming out of Fusion 360.

A simple test rectangle was adding circles at each corner of the part as a means to transition to the next cut instead of just "turning the corner" as one would expect.
Turns out the AXYZ post(version 44083) has a "Built In" maximum circle radius of 1000 which when reduced to 0.001 eliminated the circles at the corners. This can be found under Post Properties, Built Ins.
Nothing would show this anomaly until I opened the code in Toolpath. Then it was as obvious as the day is long.
Now I only use Toolpath to do a quick check of the toolpath to make sure it is clean and to be honest once I figured it out I haven't been back to Toolpath at all.
I'm using DNC exclusively for transfering files to the PC and once they are there I can essentially turn the PC off. I've found the transfer times to be pretty quick but I've yet to do anything really complex.
Did a bunch of test cuts and some path tracing of letters, some chamfering both of features and lines and everything is dead accurate, Very happy at this point.