I've attached a sample of a full Residex CMA report for comparison. This one was generated several years ago, but the difference between a free website report and the full deal is substantial.
Also note the level of confidence on the front page. We find that when properties have a 'high' level of confidence, the estimates tend to be fairly reasonable. Anything else than the number on the front is almost certainly going to be way off, but the data inside is still very useful. I'm happy to talk someone through the reports and the data if they want to.
Both Rolf, myself and several other brokers here provide these reports to clients.