This utility comes as an alternative to using Mac's Contacts tool for managing your address book. With its help, you can import contact information from various types of accounts (Google, Twitter, etc.) and easily organize your address book according to your needs.
The program might come in handy to people who are dealing with multiple address books and wish to quickly merge them into a single, duplicate-free record. A setup assistant will guide you every step of the way when configuring an account info. In my testing, I imported data from a Gmail account and added a couple of contacts to my existing address book. I also checked if there were any duplicated contacts and attached tags to existing contact information.
Furthermore, the tool is packed with a search utility that helps you immediately locate the contact details to you need.
A disadvantage is the fact that you cannot export any data, at least, in my testing, the export option didn't work at all. Also, you need to make an in-app purchase in order to unlock all of the program's features.
In my opinion, you should give this tool a try and see how it works on your Mac. You have nothing to lose.