I bought a then-still-IBM Thinkpad in 2005. It was a T42, I think. Over the next five years it did over 700,000 miles of flying with me, was dropped (in and out of its case), stood on, had coffee spilled on it and was generally abused. By the time I replaced it in 2010 the CDROM had packed in and the letters on the keys were mostly worn out. That's it. I gave it to my mother as her first laptop and it's still going strong, three years later. So 8+ years uninterrupted service.
Obviously I was immensely impressed with that, and contrived to immediately buy a new Thinkpad. "They can't be all that different" I thought. I could not have been more wrong.
Its replacement (I forget the model right now) was DOA. The replacement lasted three weeks before suffering a terminal mainboard failure. Lenovo, declining to replace it, took almost three months to return it to me.
Over the next year it progressively disintegrated. The DVDROM died, the keyboard had to be replaced, the hinges needed constant tightening and the hard drive was replaced twice and it developed cracks in the lid, and the battery was almost useless after a few months. The power adaptor socket also broke. It looked cheap, it felt cheap, and it was anything but cheap. Lenovo could not give a fuck.
I will never buy another Lenovo product, Thinkpad or not.