Was having heaps of issues early on, lots of stuttering. Particular places made the game either hang (rarely) or crash completely (most of the time)
Happy to report that I updated today and had a bit of a test-play. BuildID 790226 and everything is running much nicer. Havent noticed any stuttering, and I just played for a good hour without it even threatening to crash. Framerate seems better too, havent noticed it getting low at any point as it was before.
Was holding off playing the game too much until this stuff was patched (doesnt help immersion when the game is crashing!), so feels like Ill be able to play through without issue from now onwards.
Cheers guys! Loving the intriguing story-line going on with SOMA
(Windows 8.1 Pro, 64-bit, i5-3570K, GeForce GTX570 if extra details needed)