A magnet closure bra is comfortable to use. It does not dig into your skin when you wear it. Since the closure is at the front in between your breasts, they provide a balance, unlike the regular bras that can make your boobs seep lopsided.
You can sleep with a magnet closure bra without discomfort, and even after long hours of wearing a bra, they wouldn’t find those bra lines on your side that come with wearing traditional bras.