Pro: Kills germs with UV ray from sunlight. Con: Rubber soles will dry out, rendering your shoes less 'grippy' on court. PU & leather lining will deteriorate/age quicker.
Just keep it in a well ventilated storage when not in play. Otherwise the bacteria will turn into fungus
well you can always keep bacteria in check by spraying it with shoe spray - Scholl shoe spray works wonders.