I'm wearing these pants right this very moment! Love, love, love them, and I also have a pair in white that I love. Super comfy, with a breezy, casual style that I love--can be dressed up or down.
I'm due beginning of August. I wore similar drawstring pants from probably 3-5 months, then they just started cutting into me and not being comfortable anymore. I could never get the hang of wearing the belly band things over my other pants/jeans -- they would always fall down. *shrug* Maternity jeans are comfy enough for now.