I also love this cultivar as attractive, hardy, vigorous, free standing and mildew resistant.
An oddity, that personally I don't mind, is that it apparently has some genetic instability.
All of my four purchases of 'Peppermint Twist' show branch mutations, apparently back to 'Candy Floss'.
'Peppermint Twist' itself was originally discovered as a branch mutation of 'Candy Floss'.
See picture.
