I never had any cleaning requirements. I didn't trash any places, but I didn't leave them spotless. Sometimes, if I was in a rush I wouldn't have time to take the trash out before leaving. I never had any complaints from hosts, and most of my reviews claim that I am extremely tidy/clean guest.
My biggest issue with Airbnb is that the filtering/search doesn't work well. There isn't a penalty for "lying" (stretching the truth?) about certain things. Too many people put "Dedicated workspace" despite having no dedicated workspace. Some people are too honest and don't put "dedicated workspace" despite having what I would consider a great dedicated workspace.
It means I have to manually sit and look through the pictures to figure out if I'd have anywhere to work or not. I know a lot of people like to work from cafe's, but personally I hate doing that.