Atlassian Confluence

Pros

Real-time simultaneous editing
Ease of finding and organizing what I've written
Constantly adding new features
Integration with Jira and Trello is great, but also works as lightweight project management by itself

Cons

Honestly, they've fixed my biggest cons, like storage space (now you can buy a bigger plan) and they keep adding more things.
I think my colleagues would say there's still a learning curve, which is understandable, and I think Confluence has been changing the interface with more tips and features for new users (which is sometimes confusing for long-time users like me, LOL)
One big con is still the limited integration with MS Office. Confluence fully replaces the need for Word in most cases, so that's not a big deal, but I wish the Excel integration and/or the table functionality was better.
Also, printing is pretty tough when you have tables.

Pros

From the word go, our team was able to jump start and create a solid knowledge base for our entire enterprise. Being in Education and E-Learning domain - content is the heart of our business.

Managing content created by various teams inside company, partner contributions, freelancers content is extremely crucial and critical.

Some of the most important features of this product for us are: Document Management, Knowledge base, Version Control System, Structured Pages, Search

Cons

Confluence product does content related work really well. But that's not enough as we have grown in last 3 years and so are our requirements.

Integrations with forms, data collections, Kanban board, tasks etc have become kind of a must rather than good to have features.

We are currently on the premium plan and $10 per user for just managing document and collaboration seems little too much, specially when there are products which provide much more for less.

Pros

Confluence offers my company a unique solution for creating and organizing documentation and assets that need to be share amongst an entire team. In addition, it offers us a means to share some of those same documents and assets with our customers without any additional effort. Its advance permissions schemes allow you to dictate which users have access to which files, and its ease of use allows for quick publication and instant distribution. As we also use JIRA for project management, Confluence is a great complement for linking supplemental, more detailed files to ongoing projects.

Cons

Confluence word processing features are a bit rudimentary. While the application itself is easy to use, its feature limitations only allow for a certain level of detail and imagination when creating new documents. While it links seamless into the JIRA project management platform, it does come with an additional cost per user, which quick racks up your monthly Atlassian bill. For more advanced needs, an alternative platform may be a better fit.

Pros

Highly configurable and easy to use document templates, beautiful interface akin to using Medium, and deep integration with Jira Software and Jira Service Management are the features I find most useful. Recent changes to Templates to enable you to quickly search and preview available templates is incredibly helpful, as inline commenting while editing and being able to quickly convert anything into a Jira issue. Being able to use Confluence to defer service management requests by offering reporters the option of self serving an answer to their question/problem is a stroke of genius.

Cons

It's beyond irritating that exporting documents as a PDF is so horrendous out of the box. I also find the concept of Actions vs Jira issues confusing. I consistently find myself missing actions that have been buried in Confluence.

Pros

The thing that I like most about Confluence is that I can create linked set articles in order to maintain technical documentation, which can be distributed across a wide range of teams and departments easily using the built-in shared features. The tools make it easy to embed pages within a page in order to create easy to follow guides. The ability to use tables and pictures helps a lot as well, and they're a lot of add-ins that can be used, such as code blocks!

Cons

If not set-up well, the organization of a workspace can get out of hand, making articles very hard to find. It is paramount to have a plan when creating pages and documents. There are not a lot of custom formatting options, and as far as I can tell, no way to automatically create a table of contents for a page, which would be a huge benefit.