It definitely is durable, my friend's got one (E 530) and the thing not only feels solid but also looks damn good. The rugged looks of the laptop alongside with it's awesome matte screen was the reason he bought it and after laying my hands on it I can say the thing is much more reliable and durable than it's competitors at this price.
Sure, the high end Thinkpad machines are way better than the Edge series and there is no doubt about it. But I can assure you, this thing is a lot more durable than the average laptops and seriously, except for some overuse of red color at some areas, looks even better than most of them IMO. The moment you lay your hands on it and feel the sturdy yet smooth surface, it's really hard to not fall in love with it.
I'm an MSI fan and love my MSI CX61, but really, if the Edge had a better GPU I would've bought that instead. (here E 530 comes with GT 630 which is good enough, but not as good as my GT 640
)
Sorry if I got too excited. I just love the thing.