I still have the same, cheap, eBay set I installed in 2016 when they first came out with no issues at all. Slight vibration (normal) and passenger side mirror is slightly tilted up (normal, otherwise the bottom of the mirror would be cut off from view) Everything still functions as it should and the arms have not cracked like some people had happen in the beginning.
I'd also say the excitement died down because it's been 5 years since they came out so they are pretty much old news.
If you are thinking of getting a set of tow mirrors I highly recommend getting these K2XX style (2015-2019) mirrors. They have much better visibility than the older GMT800 style mirrors.