Of the Intel, Toshiba, and Samsung NVMe solid-state drives he has tested so far, he comes out recommending Samsung SSDs for performance, value, and safety. Matthew Dillon commented, "The Intel 600P is a piece of junk (never buy one), and
while the Toshiba did very well in performance tests it also got rather hot, topping out at 81C, and didn't flag the over-heat or auto-throttle insofar as I can tell. The Intel actually did auto-throttle. Neither Samsung over-temp'd. The 960 EVO stayed very cool, in fact."
You can read his thoughts on different NVMe SSDs under DragonFlyBSD via this mailing list post that's backed up by a lot of additional technical results.
He seems to have much better luck than I did with the Samsung 960 EVO, which ended up dieing after a few days of use last year, but haven't been able to RMA yet since the Samsung SSD RMA web form was broken at last check...