I have a question for all the anti-snap pro-magnet girls. I have not yet seen a magnet WOC. Are security concerns more that you struggle to close the snap or keep it closed?.
The main reason I don't like snap closures is that I've had several bags from various fashion houses that have broken over time. You can have them fixed, but still. The other reason is (as you suggest) I find closing snap closures difficult because you have to line them up properly and press hard (I tried with an older WOC before buying the updated WOC). However, once secured, the snap closure is definitely more secure than the magnetic closure, in my opinion.
Still, I recently overstuffed my updated WOC. As long as I could get the flap closed and magnet secured, it did not come off - even wearing it crossbody. So I would say the updated magnetic closure is fairly secure.
So, for me, if there is an option between snap and magnetic, I prefer magnetic. Just my opinion.