I had a shiatsu treatment but not the massage, it was just pressing on certain parts of the body. I had shiatsu explained to me so when certain points on my body hurt (even though the practitioner was using the same pressure everywhere) he explained what that part related to so I was aware that I had physical and/or emotional problems in that part.
But I was quite tense during the session because I don't really like people touching me (I felt a bit forced into getting the treatment!). I'm sure if I had it again I would find a practitioner that I feel totally comfortable with.
I didn't really notice any significant changes but during the session I did feel energy flowing into problem parts of my body which was really interesting. I'm sure I would have noticed changes in my emotions and health if I was to have a few more treatments.
Good luck with your studies,