First up, this case is massive and I mean, beastly massive. With the mobo in there and a couple of 780s, the amount of space left with which to work is fantastic and makes building a new rig a much more pleasurable experience.
Lots of room for drives (space for 6 standard and 3 more hot-swap) and space to install another 3 slot cage if required.
There are a few negatives, however, which you ought to be aware of...
1) Screwing gear into the slots isn't all that easy, because the back plates that are removed to allow access for soundcards, GPUs. etc are behind a big lip of metal. Curved screwdriver with magnet is essential here, or you risk some frustration.
2) The HD cages are quite flimsy compared to the competition (in my case, a HAF-X was my prior build case). As such, even when clipped into the cages the drives easily come loose if you're moving things around or tipping the case. I even had a couple of broken latches on the front that I had to fix manually.
3) The bottom of the case, both sides are flaps that drop down to allow access to HD cages and such without having to open the main side panels. However, these only close via two small magnets and when your cabling is all setup and you put the side window panel back on, sometimes the flaps just don't stay shut. I wish Corsair had supplied an alternative latch to the magnets, so for now I have an open ticket with Corsair on what I can do to make sure they stay closed.
So yeah, the best case I've ever owned without a doubt and something I can't see being upgraded anywhere in the future. However, just a few niggles keep it from greatness and you can't help feel they've taken a plastic/cheap route in some areas where, for the price, they really shouldn't have.