I bought a three pack of these a month or so ago and thought they were a good investment.
They force you to actually THINK about the problem FIRST.I'm used to just winging it in the field,wasting a bunch of time opening cabinets and checking voltage unnecessarily.The programs will penalize you if you use the meter too often,or disconnect a wire while its hot.
When you get to the expert level faults,there will be multiple problems in each circuit.A blown fuse,a ground fault,and a disconnected wire all at once.
I thought I would breeze through the CDs but found them to be very challenging towards the end.If you need 32 hours of continuing education I highly recommend this program.