As Airbnb gains popularity, high-priced hotels are making space for humble homes with room to share, and every sort of traveler can reap the financial savings and social rewards. But while the Airbnb online booking service is simple in concept, it can be a bit tricky to navigate, especially in light of recent safety concerns and the variable policies among the host properties. Luckily, a bit of extra attention to some particularly important elements in the booking process can pave the way for a pleasant stay now, and successful experiences in the future.