The HDDs remain perfectly fine, i cant imagine how it would move from side to side, the tool free installation is really good and easy to use. Overall, Love the case, good ventilation, you need to clean the front dust filter from time to time as when it gets dusty, it looks really ugly.
The case is pretty big, bigger than your CM 690,the thing is heavy, you cant move it around a lot, its not intended to. In my cabby, the front panel audio aint working, did not bother getting a replacement or repair.
Why dont you have a look at the CM Storm Sniper or Scout? I am just saying that as I am bored of mine, maybe we can swap cases when we get bored