I first got these when I was pregnant and they were great then. However, I have continued to wear them post-delivery and now that I am back to my pre-preg size. They have no ruching on the side and are evenly cut in the front and back so you cant really tell they are maternity style. The length is great. I just love them. I wear them under my shirts at work on an almost daily basis. Just ordered one of each color.
I actually went to the store and compared the S/M to the M/L because I almost bought the S/M online because I'm usually a medium. The M/L is about an inch bigger in the width and about three inches longer. I am six feet tall so length is important to me...the M/L is definitely long, so much so that you can create your own ruching and still have it hit your hips. The straps are stretchy enough that you can pull down to breastfeed too.