Top positive review
Still state of the art, 2+ years running
Reviewed in the United States on October 12, 2017
This is a fantastic line of SSDs that has been produced for several years, and there's a very good reason that they haven't changed them: they're stable, rock solid, reliable, and about as fast as a SATA SSD can be. The only real tragedy is that the global NAND shortfall has kept their prices high, so people who were holding off on purchasing one of these due to their expectation of price drops in 2016-2017 will be kept waiting even longer, or will have to pony up quite a lot of money to get one.
The 850 Pro is pretty much the ideal balance between performance, cost, capacity, and reliability for business or personal use. There are faster SSDs (NVMe, mainly); there are higher capacity SSDs like the 850 EVO 4 TB; there are also more reliable SSDs for datacenter use with more write cycles. But this line of SSDs is in the middle of the pack when it comes to cost -- costlier than the Crucial MX300 and the 850 EVO, but cheaper than Enterprise SSDs -- while being very close to top of the line in performance and reliability, and with pretty good capacities.
Again, it would be awesome if global market conditions were different and solid state drive prices weren't so stagnant (or even increasing), but in the absence of global market shifts, this is the best we have available for now. So you can either wait out the storm and hope that NAND is more available later, or buy in at what has been a near-constant price point with a known quantity SSD that has a low defect rate and excellent performance and price characteristics in the current market as of Q4 2017.
I've had a positive experience now with five different 850 Pro SSDs at three different capacities (1 TB, 128 GB and 256 GB), so I heartily recommend them for a wide variety of use cases.