I love it. A couple of days ago, we heard we might be moving office to a different building a couple of kilometres away. I checked on OSM, and the roads were all correct, but it was pretty sparse apart from that.

It took literally just ten minutes to map the whole block - building outlines, numbers and addresses, car parks, POI for the pub on the corner. The iD editor is ridiculously good, and mapping really is quite fun!