There are 2 BIG down sides to the Exergen that we have found. The nurses try to change the batteries on them thereby damaging the casing, this should be done by EBME.(had no idea that nurses had screw drivers in thier pockets!)
The other HUGE problem that we have is that when they break down they have to be collected on mass then sent to America to be be fixed, this can take weeks/months and so you have to furnish your devices library with lots to replace faulty ones.
There are training implications involved as some one has mentioned with the cleaning and use, but all in all they are ok and acurate enough BUT only if they are properly cleaned.