Very roomy. Modestly stylish. Amazing cable management. Latches to open side panel. Mesh or Window side panel. Accepts water cooling but is a great air cooling case as well. Movable/re-movable HDD cages. Dust filters on intake fans. Quality construction. Corsair customer support - it's second to none. Can fit a lot of hardware inside and is a overall joy to build in. My friends are jealous of it. It's just amazing, really. Cons:
The stock fans are pretty weak. And the fan controller is junk. It will die eventually but Corsair will ship you a free replacement if you set up an RMA. Won't cost a dime. It's very large and very wide. No way I would consider it a Mid-Tower. It's a Full Tower IMO. Not the kind of case your gonna sit on top of your desk beside your screen. It's a bit pricey.
Note: I would say you should invest in some better fans for the 600T and keep the fan controller no higher than on the middle setting. The voltages of the controller won't fry it's self later on down the road. Or get an aftermarket fan controller for it.
EDIT: Here's mine... http://puu.sh/7KAnx.jpg