Thinkpads are great. We are on our third generation of them at my law firm. We've tried Dell and Compaq/HP, but the Thinkpads have held up the best. My original T40 (which has been retired to my home) still works just fine. Added more RAM and replaced the hard drive with a new larger and faster drive and it cruises right along. It got my daughter through high school and then was replaced with a new T410 for college. Currently have a T410 with the i7 processor at work and it runs just great. My daughter's hard drive (Hitachi) died after about 4 months and they shipped a replacement right out to me. Support continues to be great. I've taken two retired T60s home as well, added RAM and a 500G 7200 rpm hard drive to them, and my wife and younger daughter now happily use them.
Not all Thinkpads are created equal. Some, like the T line, are more robust than others. Certainly more robust than other non-Thinkpad Lenovo models, so shop carefully.
Yeah I'm an attorney, but everyone needs a day job.