Last purchase for my customer (September 24th of 2016). Samsung 850 EVO 250GB. Benchmark shows, that speed is very similar to mine 850 PRO 250GB (Model: MZ-75E250 or more accurate - MZ-75E250B/EU :)). It says that SSD is built using V-NAND technology.
Tested on Lenovo AIO 700 machine (i7 6700 3,4Ghz, 12GB RAM). Exact model of this Samsung SSD is MZ-75E250, netto price was 102€ on 2016-September 20.
SSD will be placed to Acer V3-772G as a main disk (test coming soon)
Want to know more - ask in comments! I will answer for every question :)
