Have used for only one month.  Works just fine.  Much better than my old HP with Windows 7.  It's quick and accepts peripherals without issue.  I use two monitors, scanner and two printers.  I do not do gaming so I can't speak to that.  I was skeptical about Acer since I'd never owned one but I can't see where it lags Dell or HP at all.  I use it on a daily basis, mostly for legal business, and it handles everything I do without hesitation.