Anybody familiar with Airbnb?

Anybody familiar with this company or use it to rent properties? I had never heard of it but found out a couple of people I know make a lot of money in Houston using it. It is like VBRO but not restricted to entire properties. You can use the service to rent a whole house or just a bedroom. The summer intern in our group used the service to rent a room from someone over the summer. Would seem a bit creepy to live with strangers to me, but it is kind of the hotel / apartment version of UBER. A guy that is about 30 in our group has bought two condos in downtown Houston at about $250K each and rents them both out. He alternates where he stays depending on which one is rented. If they both rent he stays at a friend's house. He said he makes enough to make the payments. Another guy I know has a huge condo and said he rents his place for as much as $6000 a week. When his place rents he said he just books a $100 a night Fairfield Inn and his family stays there. He said the kids enjoy the pool and the wife doesn't mind because of the money they are making. Sounds interesting. Anybody have any experience with this concept?

Airbnb