I've had experience with Cubix Solutions, it isn't worth it, to be honest there is no software out there that can automate craiglist for you. Craiglist is always changing their algorithms so their bots can stay ahead of the game. They also have a lot of live moderators that do a pretty good job of keeping things under control when it comes to enforcing their over posting laws. My experience with Cubix was horrible, the program isn't controlled enough, it's too genreal. First of all their posting capacities are very limited and with phone verified accounts these days it doesn't work well. I was also was using it as an auto responder for FSBO & FSRO ads, it was terrible. If the same ad it just replied to was posted again, it would immediately send out another email to that person. I had a bunch of angry emails one day telling me to stop harassing them. I shut it down after a week and then spend a bunch fighting with the support guys who didn't really know what they were talking about. The bottom line for me is, you either have to do the posting yourself or hire a VA to do it for you. That is going to be the most reliable way to post and respond to ads, Craigslist just has to many security measures for computers to try and get around.