I used Falconview in the USAF years ago...incredible planning system for tactical events....
I think iFly is much more user friendly and intuitive for the types of GA flying we do...IMHO. Less memory intensive also.
Falconview was great for strikes, airdrops, insertions, night low-levels, etc. To me, it is just a bit overkill for GA purposes, but has great utility.
If it were a choice between iFly with ADSB info, and Falconview without ADSB, it would be an easy decision for me, but each PIC has his/her own preferences. Where I fly, the sky is a bit more congested, so the ADSB is of great value now.
Best of luck!
Mike N714AJ