Rated 5 out of 5 stars

This addon is really fine. The user interface is quite good.
But there is a problem when syncing with owncloud (I am not sure if it is owncloud dependent or not): If I edit more than one contact (lets say three contacts) and start syncing after editing the last one, only the one which is currently selected will be correctly synced to the server. All other changes were lost: The other two contacts appear in the state before editing. The changes can not be found on the server. So you always have to press the sync button after each edited contact before you select an other one. Hopefully you will never forget this when editing. If there will be a solution this addon gets 5 stars from me.
Mark
Thanks for the quick response: The failure was on owncloud. After fixing this issue, it works perfectly. 5 Stars!!!
Mark

This review is for a previous version of the add-on (28.6). 

Hi

set the debug mode and increase the log size in CardBook preferences (first tab)... retry your operations (3 modifications + 1 sync) then look at the CardBook log to see why 2 of your modifications were rejected... If you do not find, email me the log, it should be relatively easy to solve :O)