The main contraindication is for people with artificial joints like knees, Hips, Shoulders etc.
Pwer Plate and 3G Cardio list a disclaimer for Pacemakers as well but there is no problem at all with Pacers and both Medtronics and Boston Scientific .. makers of pacemakers .. said they have tested the machine and found no interference of problem with their pacemakers and these machines.
No mention at all about epilepsy so I'm sure you would be okay. Its not like a jack hammer or anything like that.
You can start on the low setting and slowly increase as your body adapts and you get used to it.