VRBO and HomeAway is the absolute worst site for homeowners. They beat you into submission by threatening to move your ad down in the searches and force you to use all of the horrible services they offer. On top of that, their web site is downright childish. As soon as another company can come on board and get the eyeballs, I will dump VRBO in an instant.
As a renter, I have had nothing but great experiences when I rent directly from homeowners. The issues arise when you rent through a rental management company who is posing as a homeowner. The rental management companies typically provide much less in the level of service.