Hmm, well my experiences are more to do with the quality control and cost cutting measures from various "authorised" repro parts manufacturers (or their subcontractors).

No company names mentioned.

Repro cabinet art that doesn't line up around the corners when the originals did.
Cabinet art that uses the thinnest vinyl available to cut costs and which tears when you try to apply it.
Cabinet art that was reproduced by scanning one side only of an original cabinet and then made to reproduce both sides, despite overlooking the fact that the original art was different on each side.
Playfields that miss drilling holes/making necessary cuts/misalign holes despite claims they were done using the original CAD files from BW.
Selling seconds quality playfields whilst advertising them as acceptable firsts.