Poor quality designs:
Stuff that regularly melts down or bursts into flames without provocation.
Poor quality control:
Loose parts, misaligned controls, crappy finish work, etc.
Poor customer service:
A lot can be forgiven from the above if there is someone at the company of manufacture who gives a hoot that you are not satisfied with their product. Everyone makes mistakes. But, if the company is unresponsive, rude, accusatory or otherwise unaccountable for their shortcomings, I find that totally unacceptable (not to mention irritating.)
Stuff that regularly melts down or bursts into flames without provocation.
Poor quality control:
Loose parts, misaligned controls, crappy finish work, etc.
Poor customer service:
A lot can be forgiven from the above if there is someone at the company of manufacture who gives a hoot that you are not satisfied with their product. Everyone makes mistakes. But, if the company is unresponsive, rude, accusatory or otherwise unaccountable for their shortcomings, I find that totally unacceptable (not to mention irritating.)