Honestly, I liked the voice over. Felt it gave it a very film noir feel to it.
"I don't know WHY he saved my life..."
I like it, too - because it's so awkward and
off. Reportedly Harrison Ford hated the idea of the voice-over and was trying to sabotage it by delivering a stilted reading. Ironically it just makes him sound more convincingly like an imitation of life instead of the genuine article... which is of course quite effective!