There have been some really really awful Lenovo Thinkpad trackpads in the last 2-3 years -- one specific one that I have used that you see a TON of complaints about was the X230 trackpad (google it, it's a mess). One of the worst I have ever used, with no amount of adjustment that can fix it -- Lenovo really dropped the ball when cutting costs. The worst part was that the X220/T420 and plenty of other older models had perfect trackpads.