I've put in roughly almost 200 hours into the game so far so I definitely got my money out of it so far.
If you are looking for a MMO with a very strong single player story focus AND you are interested in Star Wars, you will probably love the game.
What does that statement mean?
It means you can play from level 1 to 50 using one of the 8 character classes and get a totally unique story that is very well done, with excellent combat and nice zones.
You can play through a second time on the OPPOSING faction from the first and get another totally unique story, without doing any quests over again.
After that, you end up with cross over, where the main class story is good but you start doing the normal quests over and over again.
Now, if you are only going to play one character, you will run into issues after you hit the level cap because the PVP and the Instanced Raid/Group content is still 6-9 months away from being good OR having enough here to keep most people busy for more than a few weeks IMO.
Now for myself:
I hit level 50 the other day and I just completed the Jedi Knight story line today, so there is roughly 30-50 hours more play left for me until I gear up my character fully, buy all the skills, etc, etc, assuming I choose to max out my level 50 Jedi.
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I survived to the end and got nothing out of it, but hey.