I currently use a T460p which after almost 4 years of constant use and lots of traveling still runs perfectly and hasn't had any hardware defects. My battery ev

I currently use a T460p which after almost 4 years of constant use and lots of traveling still runs perfectly and hasn't had any hardware defects. My battery even still has 95 % of its initial capacity, which I find really surprising in a positive way. The model I used before was a T430, which had to be repaired twice during its 3 year lifespan and which had many issues (broken/loud fan, failing hinges, broken display connectors, broken chassis parts). For a while I also used a Carbon X1 and a P60, which I had very good experience with again. So I'd say the build quality and materials can strongly vary depending on the model, though I think it has become much better again recently. The prices have gone up as well though, so I'm seriously thinking about buying a Macbook Air as my next laptop as the price difference to an X1 or T model isn't that large anymore.