A wise man once said that most of the fishing lures on a store shelf are meant to catch fishermen more than fish. I tried Listingbook for a year a couple years ago and found it to be similar to a fishing lure that fish won't bite. When I talked with them about ways to get more traffic to my Listingbook pages, they "reminded" me that Listingbook is a CRM tool, not a real web site. Getting people to use the product was my job.
With the improvement in IDX systems that integrate MLS information, lead capture, prospect communication, and saving of favorite searches and properties within your own site, there's not much use for any other systems. I ended up integrated iHomefinder into WordPress and it does everything.