From the old IBM classic series.
Ranked in these QuestionsQuestion Ranking
Pro Good keyboard
can not perfect any more
Pro Easy to upgrade hardware
upgrade the RAM and HDD as you wish
never blue screen&crash
Con Computers may have man-in-the-middle adware installed
Lenovo is shipping computers preinstalled with man-in-the-middle adware called Superfish. It's a web proxy that can hijack any web session, including encrypted/https sessions. And since the root certificate is the same for everyone with private key present on the machine that's now publicly known, anyone can spoof any site to people using Lenovo laptops. Currently, it affects IE and Chrome browsers with Chrome expected to push an update that will block the certificate soon.
Uninstalling Superfish won't remove the certificate.
Lenovo are standing by their choice to install adware.
Con Lenovo installs their software on clean Windows installs by using rootkit-like methods
Lenovo has BIOS overwrite Windows system files when the computer is booting up.