7 Pounds...?

I just watched the highly anticipated movie produced by Will Smith called 7 Pounds. I have to admit that I was extremely glued into the movie from the beginning to the end although there were some downfalls. 7 pound's actual story line is excellent with a great deal of mystery and confusion from the beginning to the end, which got me glued into trying to figure out his actual occupation and intentions. Some bits in the movie really portrayed extreme situations, filled with anger, love and also passion. I found out, however after the second time that i had watched it, some of the faults that really bring the movie down. To start off with, the movie is way too long. It carry's on for a long time with no answers despite the fact that it is all explained in the end, which I thought really brings down the quality of this movie. Everyone that I have watched it with enjoyed the movie, but just felt it carried on a bit more then it should have. Also I didn't really understand why he had committed suicide using a jellyfish. Surely the shockwaves of the jellyfish could cause some harm to internal organs which defeats the whole purpose of the movie. Although overall, I thought the movie was great and I really enjoyed it, and I would suggest the movie to anyone to watch atleast once, and at most once.