The only time Magsafe breaks like it's supposed to is when it's sitting on my lap and my leg bumps it, pushing it straight up. Which is just an annoyance, not a safety feature.
I am definitely going to miss MagSafe and am hoping the third party market comes up with something that will emulate it enough to where I don't have to worry about my laptop going flying because some cut doesn't watch where he is walking and accidentally kicks the cord.
Yeah, if you have it sitting on your desk and slowly pull on it the magnet will hold... but give it a quick tug, laptop will stay, cord will come with you.
Magsafe might be better than breaking a connector, but those aren't the only choices that exist. There is a far better solution, and it's really odd that Apple hasn't figured it out.
For me, I have a 2012 non-retina MacBook Pro and the magsafe works fine for me on that. I think this is one laptop people consider heavy though. (Personally I am alright with the weight and love its plethora of ports).
Maybe it's useful to some, and I agree it's great engineering... but it's never once worked for me in practice. I only find myself cursing when my leg bumps it and it stops charging.