text: They are okay. I haven't struggled with engorgement, so I can't attest to the cold side, but the warming process for pumping wasn't really helpful at all. Its a lot of work to get it warm before pumping, and by time your 1/4 done its cold, making it not worth the hassle. (I didn't notice much of a change anyway) It was helpful in clearing my clogged milk duct though.