It’s the same with all pegged instruments like Violin or Ukulele.
I have a few Ukes with tuning pegs, and they were a nightmare for me compared with the geared tuners on my guitars and a couple of other Ukes. I didn’t have a harp then, but when I got my first harp, I guess my experience with pegged tuners helped a lot because I never had any problems making small adjustments to my harp tuning, and I can guage adjustmets of 25 to 50 cents (I call a cent 1/100th of a tone) almost perfectly. That’s with my 22 string lap harp. Remains to be seen how I get on with the Ravenna when it arrives 🙂 More strings, higher tension, etc.