The beauty of the MagSafe connector was that Apple had found precisely the right balance between attachment and detachment. Strong enough to hold the connector in place, weak enough to detach if it gets yanked.
The MagSafe 2 connector fails that balance test. Badly. The magnet is too weak. It’s so weak, it keeps falling out. It falls out if you brush it. It falls out if you tip the laptop slightly. It falls out if you look at it funny. It’s a huge, huge pain.
I’ve been using a 2012 MacBook Air for the better part of two months now, and I haven’t noticed this problem whatsoever. Whether traveling locally or internationally, the Air has been with me at all times, and MagSafe 2 has unquestionably been a trustworthy companion.
Although I tend to aesthetically prefer the preceding L-shaped MagSafe connector, I certainly haven’t suffered through the same levels of anguish that elements of the Apple community have been privy to.