Is more or less hit and miss for me. Crashed once more in a hunt with LOD & LODStreaming on, and nearly again with a massive slideshow during an S rank only to have t9 later that night give a few slow downs, ending myself up with performance/sync issues later on if the client was not restarted (player names turning into spellnames they cast, screenshots not properly being taken with "Failed to take screenshot" message, and if you attempt any kind of graphical change in the game you get the whole "Unexpectedly closed (1)" message.) One thing to note during the slowdown was that there was a few on my TS mentioning I had the DC symbol, over my head.

Specs:
OS: Windows 7 Ultimate 64bit
CPU: AMD FX-8350
GPU: Sapphire R9-290 (x2) crossfire config - 14.6 R2 beta drivers
RAM: 16GB