Top bin of Samsung B-die IC's. Next competitive kit is G.SKILL's recently released version at 199.99 for RGB Tridentz, Ripjaws are 179.99. Both run at 1.45v, Oloy are binned for XMP 1.4v.
Edit: To clarify these are really aggressively binned. There aren't much better options in the 2x8 segment for RAM overclocking unless you want to mess with Micron B 16GB sticks for high frequency.
Prices are starting to come down again, but this is rather solid considering history of kits with these specs.
Cant comment on brand reliability, but they OEM for other competitors from what I understand.
EDIT: Price dropped 142.99 > 139.99