i have a CM seidon with the stock 140mm fans it comes with. the heatsink is inside the case, the fans on the outside. once in place, i cannot put back the front cover since a plastic rim (on the inside part of the front cover) doesn't fit between the bottom of the left fan and the small front i/o port.. the one with the USB ports, power switch and front audio.
i can build this the other way around, with the heatsink on the outside and the fans inside, but that woudl mean either having the fans in pull only (not ideal) or having a weird airflow. in my build the heatsink sucks in the air, and it's the one component which gathers 99% of the dust particles. built the other way around, dust would come in from the back and get everywhere.
consider now that while my heatsink is caked in -easily removable- dust, the gpu is completely dust-free. i see this as the ideal build for thsi case and i'm not happy to have it the other way around.
while we're at it, my case had *really* tight thumbscrew holes and/or thumbscrews (i had to buy a screwdriver to get the
thumbscrews out).
also the sata ports in the "riser" that sits under the mobo tray, where you plug your HDD's cables (the HDD are hotswap, i'm talking about the other side of the hotswap link) are inverted so if you want to use angled sata cables, you can only plug one in, not two.
the PSU sits too close to the other components, so if you have a large psu, more so with a modular psu(which have the cables ending in plastic locks) the cables will be really squashed, as the space between the front of the psu and the plate that holds the hotswaps is barely enough.
(they could have just put the DVD on that side and the HDD on the other, and no problem there)
all these are relatively minor annoyances; i love the strength of the steel panels, and the size of the case is perfect. the paint job, i'd give it a 6/10, looks great but i already have a few chips; i'm not planning to lug the case around, but someone might ...
so, the case is robust, looks nice, has a mobo tray (always a plus) which installs well, is spacious and easily accessible, has enough holes/cable management for a clean build, and is not expensive; thats good.
but, i had a hard time getting support from CM, so i'm not sure i would buy again. this includes getting support for the seidon, so i'm bundling both problems in one. in the end, i'd say it's a good case. there's worse options out there.
here's a video review of the evo:
https://www.youtube.com/watch?v=aOMGXz20LM0