The setup was super simple, i.e., assuming you have Chatter enabled, then you're all up and running! You can make/add more features to Chatter, so as to enhance the tool. For instance, creating Chatter groups, leveraging the automation tools to create automated posts (welcome posts instead of email notifications), etc.

The setup was easy. You need a certified Salesforce developer/administrator to make it go live smoothly.

The setup was not straightforward. We ended up redoing what the first vendor did to make it better.

It was quite easy to set up.

Straightforward