A great RPG in it's own right but some problems hold it back from being a classic like the first one.
Gameplay - Basically, if you've played the first Kotor then you're not going to be surprised by The Sith Lord's gameplay. TSL basically follows the formula as close as possible but offers a few little (but nice) twists. Like the influence gains and losses with your comrades. Unfortunately, for those who played and enjoy KOTOR and were hoping the sequel was going to try lots of new things, sorry. But if you enjoyed KOTOR and wanted more of the same then you'll feel right at home with TLS.
Graphics - TLS uses the same engine as the first KOTOR but with a few minor improvements here and there. These graphics may have looked good back in 2003 but now in 2005, they're looking pretty dated.
Sound - Let me just get the music part out of the way here. It's great. It's basically the same John William's like score from the first KOTOR. The voice acting on the other hand is hit or miss this time around. Some characters are voiced great (Kreia, Atton, HK-47, Handmaiden, Viras) but some of the others leave something to be desired (Bao-Dur, Mira)
Replay Value - Like the first one, TLS provides a good amount of replay value for those wanting to return after finishing the game. They're branching paths, different characters for different alignments and genders. Basically all that jazz that made the first Kotor so replayable is intact.
Technical Issues: Unfortunately, the PC version has some nasty bugs that hamper gameplay somewhat. Sound issues like music skipping and entire sentences from characters being skipped as well. These issues have yet to be fixed. And on more than one occasion, the game crashed on me. This was a game that was obviously rushed out.
Pros:
-Same great gameplay from KOTOR
-Solid voice acting for the most part
-A good lengthy plot thats arguablely as good as the first one
-Great replay value
Cons:
-Same exact gameplay from KOTOR might turn away some
-Graphics are dated now
-Some bugs and glitches that have yet to be patched (I recommend you save often and in multliple slots)
-Has a very, very slow start
To sum KOTOR 2 up: If you endlessly enjoyed the first KOTOR and want basically more of the same of what that game offered then you'll more than likely enjoy TLS.