We have all heard of the Pegheds mechanical pegs and some of us have tried them. My experience has been mostly good and clients are fine with them once they get used to them. Defective pegs were replaced free of charge when I had a problem.
I know the Wittner pegs have been available more recently but I had not seen them until now. They look good and don’t need to be screwed in which might be an advantage. Also no right or left pegs. I look forward to trying this set out but I don’t yet have a project to use them on. I do like the feel of a flamenco with pegs mostly because of the lighter headstock.