Well - if you should get it or not is completely up to you.
Personally - I feel it lacks in the character creation catagory as you place as a priority. There are 3 base classes, and 3 more advanced classes you choose between later in the game.
Character statistics are ala 3.ed rules used in NwN with point-buy system where you spend an amount of points to increase you stats.
Then there is the dark/light side situation, where you can go in either direction.
Futhermore there is a skill system involved again much like 3.ed rules D&D NwN rules.
That being said, I find the game very good - I would place it better then NwNs official campagin, I don't think it rivals BG-series(but then again - not much do

). There are some decent to good character development from the NPCs that can follow you along (you can have two compainions at any given time, but you can choose between 9 almost at will), and there are interaction between these NPCs and you, and vice versa.
When the NPCs level up, you can customize their character as you do your own, and you have full control on their equpitment and can have on their movement - much like done in BG-series.
The story is rather okay in my oppinion, by not completely unexpected, if rather obvious at times

.
The graphics are great, if you have a computer that can run it. I didn't have all settings on full myself and I have a rather hefty computer

But the graphics were still great.
Sound is good, and all dialog is voiced with possiblity of subtitles - although the aliens languages are rather limited to a few sentences, they still provide a means of atmosphere.
One thing I didn't like though - was the limited areas, much like BG2/NwN you run around in several smaller areas with a clear path in them, and it is a bit "restricting" for thoese that are used to Morrowind-type worlds or MMO.games.
The variety of the areas are good though - and ranges from world to world, from desert on Tatooine, to waterworld on Maanan and so on.
The game isn't terrible defficult, but I feel that is a lacking quality of most games in these days - looking at NwN and such. But it still offered some challenges, but mostly due to difficult opponents - more so then puzzles.
As an RPG I don't think it is up there - but as an action based game it is really great, and I don't regret for a second that I bought it.
Hmm - there is probelry more, but I seems to have forgotten it now.
If you have the cash to spend on a game, I would recommend this in a heartbeat

It is a good game.