Pros: Well built, solid construction, mostly metal exterior and interior.
Easy to work in with plenty of cable management options.
Very modular.
Included power splitter is a huge help to streamlining the two computers in one goal.
Lots of cooling options.
Looks amazing inside and out.
Exterior lighting included, easily matched with interior LEDs if you buy phantek's brand.
Easily accessible fan filters everywhere.
Motherboard standoffs were already installed which is a nice touch.

Cons: Fitting two of every part and cable in one enclosure is very challenging, even with all the helpful tools and space that Phanteks provides.
Mini ITX graphics card sits too close to the mATX cpu for my 212 Evo to fit in vertically. It fit horizontally and I'm sure there are many good air coolers that will fit just fine, but I ended up switching the mATX to an AIO water cooler to avoid this problem entirely. Plan accordingly.
Really nitpicking here, but the 2x24 pin and 2x8 pin extensions needed to build inside this case were not included. Had to buy my own, though it ended up being a blessing in disguise as I got to choose the colors I wanted for the cabling.

Other Thoughts: Most builders probably have no need for a case with this functionality, but for people like me who like to use two computers simultaneously, it's a godsend. The experience of building in this case was challenging and rewarding. Phanteks adds so many nice touches to make cable management a breeze, and there is enough space inside for all the things I wanted.

The end result is also incredible. This case large, but definitely more space efficient than having two separate computers. There is more than adequate airflow to maintain good temperatures throughout, and the looks! Wow! The double window really rewards me for taking the extra effort to color match my parts, especially after I added a 2m LED strip to light it up. There's nothing like seeing two of everything nicely arranged in one enclosure. The interior LEDs (that I added) also match the color of the (included) exterior light strip which is a plus. The way the I/O is handled is also very clever with one on the side/top of the case and the other taking the place of a 5.25" bay. I am an extremely satisfied customer and would highly recommend this case for anyone who has or wants to have 2 computers in one desk. 10/10 would purchase again.