BioWare is running another free weekend taster for Star Wars: The Old Republic which has already started running and ends April 9th at 12:01AM PDT and 8:00AM BST.
It grants the first 15 levels and all the origin worlds are open to be played upon. For those quick enough you could reach the capital worlds. Trial characters are kept safe.
If after the trail a user wants to start subscribing then their hard work can be continued. PvP Warzones and Flashpoints are open to trial members also. Why not give it a go?