Scratching my head over CLAMP (again)

Ah, CLAMP.

I just read Tsuabasa: Reservoir Chronicle 24 and 25, and wow am I confused.  It's a familiar feeling, this breaks-are-out-but-what-a-view feeling.  (I remember it from parts of X/1999 and, not surprisingly, XXXholic.)  I kind of want a flow chart to show who's who when and where and for how long.  And stuff.

Definitely an enjoyable exercise read, I think Tsubasa will have good re-read value in general, even if it tanks at the end.  :)  I guess I think that just because the roller coaster's last hill isn't as much of a success as the first doesn't mean it's a bad ride.

Do you think a series' ending makes or breaks the series?