Here is a few video is using real PvP situations to illustrate the classes strengths and weaknesses. 51b5j
If your thinking about creating a Commando Gunnery spec, with different ability animations and names
And finally here is a video of a Level 50 Mercenary Bounty Hunter (Arsenal spec) soloing 2 named boss-level mobs at the same time, wich hopefully should give you a good idea of how the Mercenary plays in solo PvE content.
