Lots of positives with BG2. Lots of replayability, good price (in U.S. anyway), good graphics, very interactive (IMHO).
Negatives:
Can sometimes seem too long at times. Some minor storylines get stretched a bit, IMO.
Some of the dialogues are just too damn long...especially between the NPCs in your party.
If you are unfamiliar with the AD&D rules, you might be a little slow getting into it and understanding all of the rules. However, you'll pick it up quickly as the rules really aren't all that complicated, just a bit intricate in some cases.
Hope that helps!
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Now where did I leave that doughnut?!