The biggest problem I can see with this case is the lack of interior depth. The case should be at least 2" longer than it is because most motherboards have SATA connectors parallel on the front edge of the mobo and seeing that the PSU is in front of the case, it would be a nightmare to try install SATA cables ( trying to squeeze them in between the PSU/PSU cables).
Also, hopefully the side panels will have THICK aluminum so that they don't rattle, especially when there are more than 2 HDDs and fans inside the case. Even though the HDD caddy's have rubber grommet's, the side panels should be SECURELY mounted to the sides of the case, possibly with some kind of long groove/slot system. Looks like there are 3 notches on the top side of the case, but there should also be something on the bottom.
I like the red accents, but I don't like windows - I like solid side panels. I like the 1.2" of space for cable routing.
Only 1 external 5.25" bay is not enough. There should be at least 2.
I personally only use 2.5" storage (SSDs & HDD) in my main PC, and these I prefer to put into a 4-in-1 caddy that fits 4 2.5" drives into an external 5.25" bay. I could care less about how much internal storage there is. I like the fact that it seems like all the internal drive carriers are removeable. The more modular the better as far as I'm concerned.
It would be nice if you could swap a 180 or 200mm fan into the front of the case since if you load it up with HDD's most of the cooling to the mobo/vid card will be blocked, which leads me to think the case should also be at least 1" taller.
What I'd like to see:
1 - 2" longer
2 - 1" higher
3 - 2 140 or 1 180/200mm fan at front
4 - Thick aluminum side panels with tight mounting
5 - Version with solid side panel instead of windows
6 - Sound insulation on side panels