My wife and I have been running an AirBnB out of our Casita at the front of our house for about two years now. 99% positive experiences except the time a couple of relocating college students stayed with us and snuck their cat into the unit. That was unpleasant.
Anyway, it has been a great experience. We only use AirBnB as their cut is low, the management tools are intuitive and we haven't felt like managing multiple calendars with other services. We've averaged enough monthly income to basically cover the mortgage on our house each month.
Be warned, it is not passive income, though with ours being at the front of our house, the work load is typically minimal. We recently began to use a housekeeper to clean the unit and she does a great job. Even with that off our plate, you still have customer service with the guests, mostly answering questions during the booking and check-in process.
Funny enough, in exploring the possibility of buying a condo or two here in Las Vegas to turn into AirBnB rentals, it led me to @paulapant site, where she had done the same thing, and then to here.
I'll echo one last thing that's been said here. Know your local regulations. Regulations from city to city and from county to county vary widely. Ultimately, that things with short term rentals are in such flux here in Las Vegas is what made me steer away from expanding.
Good luck! It can be very fun and financially rewarding.