I agree. My husband doesn't have an Ancestry subscription but can use the Common Ancestor feature. What he can't do is see the full tree of any of his DNA matches, only the 'preview' of the tree. For instance, he has a 2C1R with 105 relatives in her tree, but only 16 of these are shown in the preview. I have a subscription and manage his test so I can see the full trees of all his matches.