In terms of functionality, feature set and safety it is so far behind the top ten freebies that they shouldn’t even be mentioned together.

I tested. In safer mode it failed to retrieve many obsolete and useless keys that anybody can find if searches the regedit and in aggressive mode it returned a nice number of false positives and still missed a few MRU. Sometimes it stopped working either during the scan or when I hit the repair button and there were other issues, too.

Clearly for me, it was released for testing purposes and still very far from being fully operational. Acronis saved me.