We love OwnerRez and highly recommend it. I almost don't want to tell our competition.
They think of everything and they seem to really know the user. There are lots of helpful videos and explanations for everything. We love all of the automatic settings too.
This isn't a con for us but I think it would be somewhat difficult if you were not tech-savvy to a certain degree. Luckily, OwnerRez will set up your listings if you need help.