TPMS has been in the news for many years but as it has become mandatory fitment in Europe (since November 2014), vehicle owners and tyre technicians are now starting to experience the wide spread adoption of direct tpms systems. Below are some web links you may find interesting.
Web releases:
Penny-pinching on tyre tech is putting lives at risk
Alleged Valve Stem Defect Leads to Class Action Lawsuit Against Fiat Chrysler
Fleets reminded that Tyre Pressure Monitoring System fault is automatic MOT fail