I did Airbnb a while ago. It was easy to use and I would say quite safe.

great way to earn some extra income. Demand quite good, if your unit has some booster values that would attract people to want to stay there, for example the location or nice interior or if its reasonably priced etc.

manage it well, if you cancel your guest last minute the cancelation fee is very high (probably higher then the rent itself)

get to know your guest well, you can briefly study their background or reviews. Most are linked to their facebook account. you can request for ID and recent photo (airbnb has this feature). Last thing you need is a trashed place or worst stolen items, so study them. Be a good airbnb host, attend to your guest needs (or at least try your best)

anyway, downside for me is cleaning up after checkout. that's something to keep in mind.