I'm on my 3rd one. The first one arrived with scratches (see attached pictures) and hard drive issues so it was returned. The second one was very slow and kept locking up with a blue screen. The second one was returned and I'm now on my third one and like the second one, I find it to be very slow to boot up and slow for video editing.  A 6 min 20 sec video took 30 min to render even after I upgraded the video card. It was also very sluggish when I tried to edit in the timeline. I use a video editor that is very demanding on hardware resources so that may be why these Z820's are not suitable for video editing unless you use a very simple video editor. Copying files from one drive to the other (250 m) took about 10 min. This seems very slow to me. I do not think these machines are suited for editing videos or gaming. They would probably be fine for surfing the internet or spreadsheets or creating word documents but anything more than that is pushing the limits of the computer.