It's very comfortable and you can sleep in it...the only reason I gave it 4 stars is that there is metal hardware to attach strap that digs into my shoulder, pretty hard, it leaves a mark. I didn't notice when I first tried on the bra, instantly loved the look and feel, but after a full day of wearing, you feel that metal piece. Regardless, I still wear it, compared to other bras out there it has good support and it's smooth under clothes. Haven't used it for breast feeding yet, but can easily pull aside for access when needed. And I like the numerous hook closure option, will last through pregnancy and then as size goes back down.