Like the proverbial bad penny, questions about vertical card compasses seem to resurface about once a year. We suspect owners most frequently consider them during annual when the whiskey model will no longer pass muster or needs fluid or other maintenance.
The vertical card is always an option, but were not sure we can recommend one unconditionally. We recently flew a Mooney with a vertical card and other than some screwy movements when turning to southerly headings, it worked like a charm and we have to say we liked it.