I owned a thinkpad and I was not impressed with its repairability. It was a T61. You can get at the RAM and HD easily enough, but the rest is not made to come apart easily. Lots of taped bits and subtly different fasteners: I think I counted about 65 screws of 8 or so sizes when I disassembled it to replace the motherboard.

All of the thinkpads from that T61 on have seemed like filmsy crap. They look sturdy, but the "metal hinges" are just covers over regular hinges, and there are lots of unsupported plastic bits that are squishy. Try pushing on the bezel at the bottom of your screen. Squish. I also hated the bit of wavy plastic with rattly buttons they put above the keyboard, which just screamed low-quality. My friend's 240 had the same issues. It seems like the thinkpad line is the same as everything else now, they just happen to have chunky industrial styling.