I conceal carry with a shoulder holster and a vest often.
If you don't mind the fishing vest look and the fact that you can't draw unless you open a zipper, it's maybe for you. The retention looks questionable, to be sure. Keep in mind the holster and giblets are likely to flop all over the place as they are attached to a loose vest, not you. I'd say hard pass for me. More flexible to have a shoulder holster (and likely better draw and retention) and then have the possibility of using various vests for concealment.
If you don't mind the fishing vest look and the fact that you can't draw unless you open a zipper, it's maybe for you. The retention looks questionable, to be sure. Keep in mind the holster and giblets are likely to flop all over the place as they are attached to a loose vest, not you. I'd say hard pass for me. More flexible to have a shoulder holster (and likely better draw and retention) and then have the possibility of using various vests for concealment.