Absolutely frustrating!
Knowing I let them know about the issue and they're not checking the items they're sending out is unacceptable.
The product has performed well for me, but more attentive service is absolutely necessary. I had to clearance my power steering bracket to get mine to fit. I shouldn't have had to do that. I would have sent it back if I didn't need the car to get to work.
This is only after I had to send the first alternator they sent me back because it produced less voltage than my factory alternator did. That was it's own source of frustration!
When I explained my issue to the tech, he already knew about it. To make matters worse, I had to pull their alternator, put my stock back in, ship theirs, then wait for a replacement. Then pull my stock one again and install one with an incorrectly oriented plug.
Trust me - I understand your frustration.
It appears to be a solid product but there's more to doing business than that.