It's certainly fast. It makes me excited for PCIe 4.0 and what they'll do with that. Possibly 7GB/s reads? 1 Million IOPs? (the 1TB 970 Pro is already at 500,000).
For me it's a great SSD for running a lot of virtual machines on my desktop system which I need for testing all the various software I write under different load scenarios.
The pro modell is actually the more expensive modell because it uses mlc nand instead of the evos tlc nand. It also has a much longer warranty and higher reliability. As you have shown it is sometimes a bit slower though.