I work in a research institute, currently as a bioinformatics training coordinator.
I am interested in P4 Medicine approach: Predictive, Preventive, Personalised, Participative. PLM is at the top of my ranking of Participative Medicine resources.
As a chronic patient, I have hypertension, psoriatic arthritis and more recently coronary disease. All under treatment.
PLM is great for many purposes. It grabs data that is impossible or very difficult to get in clinical practice. Clever doctors can use its enormous pool of patient driven data, instead of criticising it because it is not clinically validated. Its enormous potential lies in the high motivation of patients. PLM allows assessing trends in disease management in a global scale, much beyond the geographical limits of healthcare services.It also assesses data that is difficult to to collect (eg "mood") and impossible to solicit on a daily or weekly basis.
PLM supports its users quite well. As a patient,being able to hold your historical record in your hand-held mobile device, preparing a doctor visit with a pre-visit report, etc. are invaluable assets.