very happy with 2 TB upgrade
I have one, for a couple of months now, very satisfied with the 2 TB, replaced the 256 GB that came with the unit, and I have also been able to re-purpose that drive with the included accessory enclosure.
Yes, on speed tests it is slower, such as the Blackmagic, but in real life, it is about the same for video processing, image processing, etc. I also upgraded to 64 GB RAM from OWC and between the two, have great performance.
I am very satisfied with the value of the purchase. By the time it makes a difference, will need the next model MBP 2016.