Got me a white one today. Decided I needed to put together a secondary gaming system and couldn't find a cheap case nice enough, except for the Define R3 that my main system is in... No time to actually build today but a few things can be said already. First and foremost I'd like to thank the postal service for not kicking or doing anything else untowards this case as it arrived flawless.

Seriously though, the width of the case is as advertised and as usual Fractal Design have been careful not to guarantee too much when it comes to the height of the CPU cooler that can be fitted. Here in the R4 it won't be a problem at all with an 180mm cooler, as long as maybe nudging the foam on the side vent cover wouldn't be a problem. If there ever is a cooler that goes slightly beyond 180mm there's even room for that. So no worries there, and that Archon heatsink gets plenty of room to spare.
The fans look very promising. I haven't had them installed yet but they certainly don't tick or vibrate when sped up, and the shape is fairly similar to Scythe's Slip Stream. I'm putting the two fans that came with the case as intakes and hooked to the integrated fan controller. Should be great running on 5V pretty much all the time. Might end up regretting not having bought a third of these Silent Series R2 140mm for the exhaust, but I've got some fans to try there. I'm aiming on a single exhaust as well as taking advantage of this improved front air filter.
The drive cage is very sturdy in spite of being removable. So they definitely understood that this area could have become a problem if done carelessly. The individual trays also sit more tightly in their holders. Though I personally don't see myself mounting 7200 RPM 3,5" drives in my main system ever again, the fact that the drive grommets are also a millimeter or two thicker on each might be of some small help. The acessory bag also has twelve loose grommets in them, likely intended for fans, but usable pretty much anywhere you can put them.
If you do fit drives that vibrate a lot there might be a risk of the front fan filter "cover/pop-out door" to vibrate some. It's a big surface and does not sit precisely tight. Should be easy to fix with something stuck in there if it does occurr.
The front comes off smoothly with no need for brute force. Best be careful when carrying the case not to actually lift in the front so that it might come off.
Not a single source of bad smell even when taking the plastic bag off. And the routing hole grommets sit tightly so you'll have to really tug on them to get them loose, and then press on them a bit to get them back. I don't care for routing hole grommets in general so I might end up removing them all the same. There are no sharp edges behind them and the holes are nicely rounded.
Ask for measurements or detail pictures before it's too late.
