How does hosting for other sites like AirBnB compare?

I once tried listing my rooms on Flipkey/Trip Advisor, Hovelstay, HomeAway, MisterBnB and I just heard of Wimdu on someone’s post. I believe VRBO is not for house shares? I realized I could not stand the idea of syncing 5 different calendars and went back to just AirBnB which seemed the easiest. From my experience, communication and customer service was worse on those other sites than AirBnB. What are other hosts’ experiences with alternative listing sites? I.e. ease of use, host support, fees charged, insurance policies, etc.

Wow there are so many competitors popping up now.
http://www.quora.com/Who-is-Airbnbs-biggest-competition