They look quite stylish. However, they also look rather small, and I like side fans on the GPU for gaming cases.
Other then that, I like it, could be nice for a medium spec PC.
Loving the first one, I'm not a fan of masses of LEDs and fans. I like the stealth bomber look of it, the other two are still good in my opinion but not as good as the first in my eyes.
That's purely looks though they'd need the flexibility and performance (odd phrase for something that doesn't do much) to back it up though.