Old guy (50s) checking in here too. Just got my KTuner and Phearable Stage 3 this week and have been running it this week in my 18 2.0T 6MT. I am totally loving it so far, although I need to mess a bit with some settings. I ran KTuner Stage 2 for a couple days and then flashed Phearable to compare. I ran both in the default except I put VSA at aggressive in Phearable (I think I'm going to drop back on that setting - I find it unnecessary for my style of driving and it can cause some weirdness on unpaved road surfaces and slight jerkiness around gear changes, as I learned very quickly). They are both a night-and-day difference from stock. They also feel very different from one another. I know Phearable measures better, but I think I actually may prefer the feel of KTuner Stage 2. It just feels more immediate and snappy across the board, even though I might be getting to redline a bit faster with Phearable. But like I said, I gotta mess a bit with some settings.
The great thing about the V2 KTuner is that I can keep both setups stored on the unit and flash them in a few minutes at any time straight from it, which makes testing out different tunes and settings a breeze.