I wish people that left a one-star rating would take the time to leave a review. Did you give it one star because you can't figure out how to use it? Did you give it one star because you have to sign up for IDXbroker and you thought it would just be free?
WP shouldn't allow people to leave stars without leaving a review. Personally, I love this plugin and I recommend it to all of my clients who happen to be Realtors.