Can confirm that Mabel is completely legit. Her diplomas for osteopathy are proudly displayed on the wall at her location.
You will get a solid massage and soft tissue manipulation - but not the kind of soft tissue manipulation that many of us are seeking.
During my session I did get semi-hard on the flip. She noticed, and commented that it's a normal response, and started going into clinical talk, as she continued the massage. She did wear a sports bra and yoga shorts, but was clearly more for her comfort, as she does move around during the treatment.