I got these because my USB 3.0 EHD wouldn't run with a USB 2.0 cable. I'm still using a USB 2.0 port, so I don't know the fundamental problem. Thus far, I haven't had any problem but I'mholding off giving them five stars until I get my USB 3.0 port working.
Ordered two of these - one has worked, and the other came DOA. The replacement seems to be working. I absolutely do not trust them since six other Monoprice USB 3.0 cables with the same "Made in China" labels on the bags have been total unmitigated junk. Wish I had never bought any of these. Other cables I have bought from here have been excellent, but NOT this Chinese junk.
CONS: Unbelievable waste of time, aggravation and money