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Update:
After some consideration (and after owning the machine for a longer period of time), I'd like to clarify and ammend some aspects of my original post:
1) The screen casing appears far more susceptible to torsion than the screen casing on my X40, my X60s, and my X61s. That said, when closed it appears to be far more resistant to downward pressure -- I suspect it might even withstand being stepped on, which is no mean feat.
2) The case flexes, but I'm not sure that means it's not durable. As one of the members here pointed out, rigid materials may well shatter or fracture when stressed, whereas ones with more "give" may end up being more durable. (Example: the wings on commercial airliners have a tremendous amount of flex in them, yet nobody would call them "flimsy".)
3) One of the keyboard designs still sucks. Sorry, but there's no way to sugar coat it. There are two backplate designs, and while one of them is quite good (I now have both), the one with more holes in it (which the machine orginally shipped with) has a worse, flexier feel. At least it was easy to fix: I just replaced the keyboard, and it's now right on par with some of the other, older ThinkPads I've used.
Lastly, an excerpt from my reply to another post on the topic:
As for the palmrest: having done complete tear-downs of all my machines, I can say without hesitation that the X200s uses slightly more pliable plastics for the palmrest than the X61s. It's not a question of case screws or anything like that -- the materials are just different.
I've compared my machine to multiple X200 units, BTW, and have found that they *do* seem to be a bit sturdier. That said, I'd get the X200s if you want a light machine with incredibly battery life. It's still a solidly built computer -- even at its worst it's a lot sturdier than most consumer laptops -- and at the prices that it tends to be available it's really not a bad deal.
One more thing about the screen: while it's true that it's far more susceptible to torsion than the X61s, it's actually far more resistant to downward pressure when the lid is closed. I actually have more faith that my X200s would survive being stepped on whilst close than I do my X61s. The X200s appears very rigid when closed; it's just when it's open that I think it feels "cheaper" than the X61s.







