You really probably don’t know anyone who’s ever owned one, they’re sufficiently uncommon. Perfectly capable military rifle chambered in a suitably powerful cartridge of the time it was adopted for military service. I don’t know any reputable arms collectors who have negative opinions of the Mannlicher action.
My Mannlicher is in .30/06, but the action is smooth as butter. People used to make fun of it because when empty the magazine follower rattles if you shake the rifle. with rounds in the magazine, it doesn’t.