I like my V&H Fuel Pac. I have owned TTS, Powercommander and The original HD Race tuner and used both canned downloads and had the bikes tuned on dyno with reputable people who did quality work. But if your just changing pipes and or intakes the V&H units just do a great job. V&H will help you choose if you call but the unit is so easy to use I can't imagine paying a tuner anymore.
The software based companies are looking at a dim future and the electronic units are prevelant in the auto/truck market already. I know the old timers are critical of the Fuel Pac but I would think most of them ever used one.
I can't Imagine a V&H Fuel Pac could possibly tune my 2019 CVO. Cubic inches are larger than stock, compression is higher than stock, injectors are larger than stock, throttle body is larger than stock, valves are larger than stock and of course a cam and headpipe and air cleaner.
Honestly a TTS or Powervision in a competent tuners hands can get more out of a stock bike, make it run smoother and be more responsive.
That said if just a exhaust and air cleaner a Fuel Pac is fine.