Installation:

The first step in installation for the Unicorn is to prep our motherboard tray.  The easiest way to go about this is to pull the tray out, remove it off the panel, and install all the hardware.  Once all the hardware is screwed in, we can start routing power and data cables before closing everything up.

So the very first thing we must do is to lift up the latch to drop the panel down. 

As we pull the panel down, we can exactly how it splits on the back side.

With the panel all the way down, we can get a unique perspective of the inside of the case from the motherboard's point of view. 

With the panel down, the motherboard tray is attached with three case screws.  Once these are removed, the tray slides right off of the panel. 

The next step is to attach the motherboard, exactly as you would in any other case, by using the included standoffs. 

With the motherboard attached, we can now install the peripherals. 

Now, with all the peripherals attached, the next step is to attach the tray back onto the panel and screw it back in to place.

With the panel still laid flat, this is an opportune time to run all the cabling.  Start with the power, and continue with the data and front panel connectors.  Once everything is attached, close it all up while making sure all the cables have free reign and nothing is impeding any of the fans. 

Finally, using the included rails, install your drives using the included rails. 

Once everything is installed, everything should close up without issue.  Unfortunately, this was not the case here.  The protrusions from the strut bar noted earlier actually do not clear the CPU heatsink.  The heatsink, being a Kingwin Revolution RVT-9225, is not that large as heatsinks go, so I was a bit disappointed to see this happen.  It appears that with some work, the bracket may be removable, however I do believe this is what is keeping the fan in place, so I don't think that would be a very fruitful venture.  The other fit issue I discovered had to do with the hard drive cage; the rails on the drives interact with the cage in such a way that the hard drives actually stick out a fair amount, causing clearance issues with the GPU, meaning the cage that supposedly supports four drives will only realistically fit two if you have anything the size of a 7800GTX or larger.

Conclusion:

The Sigma Unicorn is a case that just seems to be full of surprises, with about 80% of them being good ones.  The case in general has a very sleek look, with a surprising amount of features.  The removable motherboard tray has always been a big hit with me, and I have always been mystified that it isn't more common.  The strut bar looks nice in my opinion, and the hidden accessories tray was a nice bonus as well. 

While the outside of the case looks great, I feel that the case internals could stand to be improved, especially considering the fit issues of the strut bar and the lower hard drive cage.  Finally, I think Sigma could have chosen a better name for the case.  In a hobby dominated by men, I somehow don't think "Unicorn" is going to do Sigma a lot favors in the sales department.  If Sigma could remedy these issues, what is now a good case could be a great case. 

Performance:	N/A
Innovation:	5 out of 5
Quality:	3 out of 5
Stability:	N/A
Aesthetics:	4 out of 5
Software/Drivers Pack:	N/A
Overclocking:	N/A
Value:	4 out of 5
Project Skill Level (5 being most difficult)	3 out of 5