I really Enjoyed Kingdom Hearts, I played Through Kingdom Hearts II, whilst I enjoyed it I felt my experience with the game was lacking due to not playing Chain of Memories (Pal Regions never got the PS2 version.)
I have been considering getting BBS for a while, truthly I have been put off the series for years due to all these spin offs on the DS, I don't own a DS nor do I want one. I feel due to this I will be missing out on a huge bit of the story (3 games... come on S-E! - The original 2 games were never on the Gamecube!).
Now I have a PSP, Thouroughly enjoyed Crisis Core. So I have faith they have portrayed Kingdom Hearts well on the PSP with BBS. However... I just wonder if it is worth it due to the lack of the DS games.
Also, I noticed there is a Final Mix title in Japan, apparently having English Voice Acting. As the PSP is region Free I am interested in knowing what the Final Mix has to offer and if I should get it instead of the original PAL release.