Diagnostic scanner for the car not just the engine recommendations

I have an odb2 reader from euro parts seems okay don't really use much and also an autel maxi-com 808. that has a screen display its not the most complex device though it will probably diagnose any issue with a micra and pretty much will be compatible with any other make/model that I would ever need.
Not something I would call cheap but it does have more of a true reading that you can rely on.
As for what it can actually do its complex enough can find faults in ABS, airbag systems and transmissions etc.
To be clear on what its unable to detect though would be damaged wires and such this is something we have to visually spot or probe for if that be the problem after the device does its job.