make sure they are certified Rolfers. Rolfing is all about the whole posture and not just localized problem areas. It can be very intense just like any deep tissue or sports massage.
If you have a localized problem, maybe you might want to try deep tissue, sports or Swedish massage first on your problem area. If you can handle the intensity then talk with a Rolfer and then decide if you want the complete Rolfing experience.
I did like rolfing, I also liked deep tissue, Swedish, and sports massage. Hated the "spa" massage such as the hot rock. They did nothing for me.
Massage is like everything else, some are good some are so so. Make sure they are certified though.