AnswerHub

Pros

Gamification elements like badges, reputation points. An ability to control permission based on a reputation score as a kind of gratification for active users.
Expertise features improve recognition! "Ask an Experts" helps to ping experts, same time you can define your expertise manually but also automatically by system to become an expert for a specific topic.

Cons

Analytics functionality that it is built-in. It is not fully reliable. The product is still being continuously improved so there some features still missing.

Pros

Easy to configure and customize for most Q&A needs. AnswerHub has very robust user and content management features out of the box (e.g. privileges, tagging, following questions, etc). The application can be easily extended through their API. Hosted and self-hosted options are priced competitively, and customer support is extremely responsive.

Cons

The built-in analytics are lacking and somewhat rudimentary. The question and answer moderation functionality could be improved, especially to enable more complex workflows. Finally, the API could be more stable and get more active development to support more use cases.

Pros

None. I've opened 2-3 dozen issues with microsoft about all the pains this software has.

Cons

With the implementation at MSFT's dev community site, navigation is poor.

It doesnt have "my issues", it has "Items I Follow" which is as useful for managing support issues as facebook's "Top Stories" is with keeping up with friends and family (this means it is not very useful).

Wasted visual space everywhere on the pages. I took a stab at making my own client UI, but the site is serving chunks of HTML to the the users when displaying issues instead of passing JSON.

Horrid and difficult to navigate alignment of posts, comments to those posts, and solutions.

You cant see a full and concise list anywhere. You get 5 (now 10) issues at at time displayed "card style". If you need to see other issues, you must click "See more" a bunch of times. This is a real pain when trying to keep up with 100+ open issues. The list cant be sorted. Results appear twice.

Issues can be closed and locked for comment by moderators. This is extremely frustrating to users when its clear the moderator does not understand the problem or simply makes a mistake.

There is no place to see posts i have reported or the results of the report.

The whole idea of requiring a paying customer to garner votes to get a company to fix bugs they have just created is malarkey, and perhaps that makes AnswerHub a victim of just being the wrong tool for the job.

This isn't about friendships, so we don't need a social site. It needs to be a competent issue and request tracker, and that it is not.

Pros

Very few products do this well. I think stack overflow is based on this product.
If you're support organization needs help to track issues and get help from user communities, or have user communities help themselves, this is the product for you.

Cons

Its a Java app. If something goes wrong, it takes a while to figure out the problem.
There have been times that other IPs have scraped our site and made it unusable.
Managing spammers is not ideal. But same goes for many other similar products.

Pros

The software is extremely stable, we've found great flexibility with add-ons and community-driven tools, and bringing it into our domain has been fairly simple. The team at AnswerHub is also extremely helpful when working on user issues together.

Cons

At times I wish the moderation tools were more flexible on the front end. I often find myself wanting to do some simple account investigation or moderation, and it would be great if I didn't have to manually search the back end to do so.