Probably be hard to find many good reviews on any replacement ECMs/PCMs, lol
Reasons being people only go to the effort of reviewing anything if they are mad/disappointed
And in the case of PCMs its a DIY project so................new PCM doesn't solve the problem it MUST BE the new PCMs fault
Its like having a misfire and replacing all spark plugs and then having the same misfire with the new spark plugs, "Must be defective spark plugs, I will write a bad review"
Being that there is only ONE WAY to test a PCM, in the vehicle it was program for, all a rebuilder can do is to replace common failure points, the capacitors, clean the circuit board and connector pins, and send it off
So a used PCM could have any number of problems that wouldn't show up on any "bench tests", but would show up when in use in a vehicle
A rebuilt PCM is the same gamble as a used one from wrecking yard
But hopefully the a rebuild will offer a free exchange, ONE TIME, if the rebuilt one doesn't work
Wrecking yards may offer that but usually not on electronic parts