Having tried numerous similar products, both free and commercial, this is by far the best. The many features are amazing really. What did it for me was when I noticed that in a front end properties details page the street view tab was missing. The reason: Street view had not covered that street ! Instead of the tab just revealing a blank panel, or a ' sorry not available panel' the actual tab was taken off !
This attention to detail makes me give this a five star rating.