Definitely regrowing my crown where I had a pretty bad spot. Crown spot is almost half of what it was in regards to how big the thin spot was.
For me it is hard to say if
it is regrowing completely bare spots, because I have vellus hairs on 95% of my thin spots, I'm always tempted to try dying my hair to see how much more coverage I'd have if I gave color to all my really blond thin hair.
No one has ever noticed my dermmatch. I have an a**h** for a step father and he'd call me out for sure if he noticed. I have a decent hairline even though my crown is terrible and the top is severely diffused. I apply it about half an inch from my hairline so that you can't see tge painted scalp effect. When I first started using it I applied it on my hairline and went on a date.., the girl asked if I dyed my hair, and when I asked why, she stated because I had dye on my scalp. Since then I've applied it a bit further back and haven't had anyone question it since.
I used caboki (fiber similar to toppik) for 2 years before swapping to dermmatch. Worked and looked great, but I hated fearing rain, hard wind, it being bumped, touched, etc. With dermmatch I can comb my hair, with fibers I had to reapply if I combed my hair because it ruined it. I've been caught in a downpour for only 10 with fibers, would have been very embarassing since it all washed down my face, but I revealed my hair issues to my gf the week before that happened, luckily. Been stuck in a 2 hour downpour at a concert with dermmatch and my gf said it was undetectable, looked good in the mirror 5 hours later when I was finally able to check it, so it has earned my trust.
Applying dermmatch is definitely a steeper learning curve. Fibers took maybe a week to be adequate with. Dermmatch took a lot of trial and error, didn't seem waterproof how I originally applied it... now I'd happily swim with it and have been on rollercoasters, something impossible with fibers.