based on my past experience with at least 2 or 3 broken Macbook chargers, I get the feeling that the MagSafe charger will see premature cable failure. I've seen a few YouTube videos of people trying to separate the Magsafe charger and the phone buy tugging on the cable. The part where the cable enters the Magsafe will likely break after a few months.
(but hopefully Apple made it tougher than Macbook charger cables?)