I had a lovely head and face massage. The only problem, as with many salons I've experienced in London is the thin partition walls in the treatment rooms. My room was right next to reception so I could hear lots of talking and people walking around- completely fine if you're going for a beauty treatment, but not ideal if you're hoping for a relaxing massage. The lady did tell me that there was a back room that was quieter so I would recommend requesting this if booking a massage treatment.
I'm so lucky that I live nearby but even if I didn't I would cross London and beyond to have therapeutic massage done here. It's so near Caledonian Road tube station, it's definitely worth the trip if you're not in the area, and if you are, make the most of what's on your doorstep!