Although sold as 'used' mine looked brand new. I easily added all my programs to the Windows 10 and glad no bloatware like from major computers makers. I added a 1tb ssd sasmsung which really pumps it up ($130).  So for less than $550 you get a computer faster than many $2000 ones.I have not seen the need to add memory. Read carefully how much this weighs. It is heavy as hell, solid aluminum. It is not a good choice for a computer that you take all over the place. I take it to a few pro dj gigs per month and it is fine for that. But daily use for class or back and forth from work look elsewhere. Heed this advice.This thing smokes and has never crashed running several heavy use programs.The thing I do not like is you have to 'turn off' the touchpad feature each time you boot it up by using the Dell program that comes one it (you have to look for that). Even when that program says it is off it can be on. Just turn it on, save, then turn it off, save. Kind of a pain but that is the only way and I spent hours online looking for solutions.