I've been running mine my 5.1 hex for about 2 months now. No problems, although I had some minor struggles on install.
I'm using 2 x Crucial M550 1 TB drives, set up as individual drives.
Pretty happy with it all. The only thing I wish wouldn't happen is that because I do have data on spinning drives, and often have reason to work on material that's on my Synology NAS, Word and Excel's Open Recent can be very slow, no matter whether the file I'm looking for is on the SSD or not. I'm assuming that the problem is that it's got to spin up the spinners before letting me do anything, on the assumption that I might want something there.
It's a minor annoyance but I don't like sitting there with my $1300 upgrade not doing me any immediate good . . . come on, come on . . . but when it's all SSD, man it flies.
I will say that in terms of speeding up some work that was annoyingly slow, putting in a 7970 made Photoshop CC just fly. Blurs, for example, appear to happen in real time as I slide the slider. With the 5770, absolutely not.
OTH, Lightroom seems to chug along no faster than before when I ask for a few hundred 1:1 previews. Exporting and importing are noticeably faster, though.