All around, easy to use distro based primarily on KDE, although there are other UI available.
Ranked in these QuestionsQuestion Ranking
Pro "Batteries included" philosophy
Main release includes most apps needed by users everyday. Windows users will see a familiar look and feel to the UI. H/W issues practically nonexistent, as most drivers come with the ISO.
Pro Rolling release model.
No reinstalling the OS after every major upgrade. Keep your OS updated, and you have the latest version.
Pro Software management and updating made simple through Synaptic.
Con Gaming can be hit or miss.
To run some titles, particularly from Steam, some "massaging" is necessary.