Probably works okay for some people, but if you look into the reviews for the app, you will see many, but many reviews giving 1 or 2 stars and the main culprit it has been the synchronization.
Yes, there always were and there always will be people for whom it does not work. The reasons may vary, and that's exactly why I wrote the troubleshooting guide that can help you finding out the reason, and fix it.