iFixit's detailed teardown of the Nook Tablet shows that the device is relatively hard to disassemble, with hidden screws preventing easy removal of the rear panel, and a number of adhesive strips make the entire process quite tedious.
Of course, Barnes & Noble never meant for users to open their Nook Tablets and fix them themselves, so it's hard to blame the company for not making the device more repair-friendly. Still, if you're the tinkering type, you should know that the Nook Tablet won't make it too easy for you - iFixit gives it a six out of 10 score for repair-ability (10 being the easiest to repair).
For comparison, iFixit gave Amazon's Kindle Fire an eight out of 10 score on the same scale in a recent teardown.
The teardown didn't revealed any big surprises. The Nook Tablet is quite similar to the Kindle Fire, if a little bit thicker -- it features a similar IPS display with a 1024x600 pixel resolution, and the same Texas Instruments OMAP4 1 GHz dual-core processor.
Check out the entire teardown here.