SE deserves 5-stars for everything, but it's the 3rd-Party Plugins that give it the 5-star for Features & Functionality. I spent over a year searching, researching, demoing, etc. many many CMS / Community Mgmt/Engagement apps. Although there were a few that were basically tied (for various reasons), it is the wealth of 3rd-Party Plugins that makes SE stand above the rest.
Almost anything you can imagine can be done through existing Plugins (and if not, modifications can easily be made by some excellent devs). There were many Plugins that I have found useful by devs such as SocialEngineExperts, SocialEngineSolutions, Radcodes, Webhive, Hire-Experts, what really sold me on providing the bulk of the functionality I required was SocialEngineAddons.
SocialEngineAddons offers many many Plugins that make SE actually useful for anything other than a very small community. Don't get me wrong, SE does a find job with what it offers, but SEAO is actually the primary reason I went with SE.
Support has been excellent by SE, all of the devs I've worked with, as well as especially SEAO. They always go the extra mile, and start working on tickets immediately. And, like any software, there are times when things are a little more difficult to resolve than other times - and that's where they really shine. They are there and keep working on things until you are satisfied.
So, if you're looking for a good CMS, SE will serve you well. If you're looking for a great CMS, SE is a great engine/back-end that other excellent devs build upon to make it more than you could ever hope for.
Sheesh - where do I start. I guess I'll just keep it simple - SE is a great CMS to start with, and if/when you need to build something there's a wealth of features/functionality in the Plugins that are offered by 3rd-Party devs.
That it's not yet compatible with PHP7, but they are working on it.
Value for money
Ease of use
Likelihood to recommend: 10/10