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STRUCTURE AND EXTERIOR
Something that really pops out at you is the structural integrity of the 509. Being made of steel, makes it not only look strong, but feel heavy duty as well. On the front of the 509 is its smaller tempered glass panel covering three quarters of the face. 
An optical drive bay as well as four USB 3.0 slots make up the upper quarter with a brushed steel finish. A headphone jack and mic jack are also provided.
An LED logo is also installed on the right side of the glass to give the case a little accent. The top of the In Win 509 is a flat black panel. Four thumbscrews secure the seamless tempered glass, giving you about an inch of space for airflow. 
The honeycomb vent pattern side has the standard two locking hand screws in the rear. One thing that sets this chassis apart from others are the hexagonal air vents more near the front. 
The 509 has an outstanding airflow system, with the addition of a slotted side panel this allows for added heat dissipation.
The rear is comprised of a 120/140mm fan slot, motherboard I/O and eight PCI-E slots. Located at the very bottom is the PSU mounting hole. 
Lastly we get to the underside of the 509. Four sturdy feet with non slip rubber in addition to a quick release dust cover are placed here. You can easily take out and clean these dust traps by sliding them out.
Review Overview
Structure & Aesthetics
Specs
Features
Test Bench Build
Price
Gamers Unite!!
The 509 is a great option for the gamer who wants more!
While I think it would be cool to see someone try and fit (3) 360 mm radiators in this chassis, judging by the internal layout installing one 360 mm radiator might be the only logical way to go for water cooling.
As installing more than one would see the others starved for adequate airflow (there doesn’t seem to be very much room in the front for decent airflow as it is).
What I pictured right off the bat would be to have either a thicker 360 mm radiator or a normal (30 – 45 mm) 280 mm radiator for the front area; possibly using the front as an output, and the other fan areas as intakes.
Just my .005 cents CAD