in my limited experience using bakers yeast and a daily feed, (live yeast can be bought from sainsburys bakeries)
the few plants i have started have all worked well without problems.
your traditional Ginger beer is intended to be drunk early when both the ginger and sweetness are strong and the yeast have only conditioned the brew rather than performed a complete primary fermemntation, so i would suggest the flavour impact from yeast and other beneficial microlife is far less than with a beer intended to ferment out to FG.
If your planning an alcoholic ginger beer i would suggest you consider selecting an ale or even a wine/champagn? yeast for the qualities you desire, and at least a partial malt component to the sugars. My own preference is for a stovetop boil of lme, lemons (peel and juice) and 750g-1kg of fresh ginger, adding a teaspoon of chilli and tablespoon of dry ginger to the end of the boil into the FV before liquoring up to 5gallons,, i ferment with an ale yeast s-04 @ 19c for 6 days before a crash chill and kegging.. (dont confuse measures for dry ginger and chilli, i did Once!!)