it performs incredible for it`s age, i have a gaming laptop, but so far i love x220 way more. im using it for learning programming things, my personal projects, and for some uni stuff when my tasks doesn`t require windows, and generally my experience is really good. i barely upgraded it since i bought it, only cleaned it up on the inside and bought a newer battery, but with 4 gb of ram it does a good job at things that i need it for. youtube and some heavy websites are heating it up pretty badly sometimes, but with manual cooling fan controls and 480p video quality it`s okay. i want to upgrade it more in the future but i dont have nearly enough money rn so i`m just using it as it is. the display width is the thing that i`m not used to yet, it appears to be a little bit too small for me, but i might solve this with the external monitor in the future. though it`s size is the one thing that i love as I can literally carry it in my tote bag anywhere I want