Those who have never spent a penny on TOR can still get sprint but have to wait till level 15. This sounds like a cheap way for F2P players to check out subscriber perks for 30 days then get bumped up to preferred status.
I played from release until my free 30 days ran out. Unless they severely overhauled this game, it's not worth more than a play through on a character class of your choice. This sprint "feature" was actually there for us early adopters too, I guess they eventually patched it out.
Knights of the Old Republic parts 3 - 10 this isn't as the creators were shilling it as last year. For an MMO though, the main storyline while leveling was above average. There were too many obvious time sinks built into the game and the lack of the ability to communicate across the entire faction on your server killed any sort of endgame dungeon running or PVP.