So far so good...got my 3 24x Duplicator and tried it out the first day. I had to make duplicates of 48 different source discs so figure no time like the present to try this out and see if it works. Now compared to burning a DVD on my computer it is slower per DVD...it takes 6 minutes to write the same DVD on my computer as it takes 10 minutes to write a DVD on the Duplicator. The computer is at 8x speed and the DVD Duplicator is at 16x speed...however, I am saving time by writing 2 DVDs simultaneously. Also, let me clarify when writing a DVD on my computer the computer will verify the DVD, when using the Duplicator I have the option of Copy and Verify or Copy and Compare which checks and matches each bit (option not available on my computer) so that in itself takes longer to do. Now, with all that being said the first 2 DVDs I duplicated on the Duplicator failed to be recognized by any computer and I tried four different computers. So, even though the manual said the default burning speed of the duplicator is 16x which would be the same write max. speed of the DVD blank media, I decided to go through the menu and check for myself and sure enough it was set at 24x. So, I changed it to 16x and made 50 DVDs that all were recognized by the computers, copied and functioned properly. During the process I had three that failed, but those were easily recognized during duplication. For instance, you put your master DVD in and then in the first slot you put in your blank DVD media...and it will register on the screen as 1, then repeat and it will register as 2, then... twice the screen showed 1 and the second slot just kept blinking green...I ejected the blank DVD and replaced it with another blank DVD and the screen registered 2 which meant I was set to make two duplicates. I pressed the ENT button and the duplicator started making the DVDs. One other time (it was after the Duplicator was done duplicating) that only one tray opened and the screen said PASS: 1 FAIL: 0 which didn't make sense since it should have said PASS: 1 FAIL: 1, but nonetheless I just went through the process to make the second DVD that didn't eject. Overall, what I like is you won't be making any DVDs thinking they are good that are actually bad...it is pretty obvious either way...it won't take the media at loading or it won't eject it. No brainer....unlike writing a DVD on a computer it will even verify successfully but then when you try to copy data there is a fatal error after the fact...that happens from time to time but with this DVD Duplicator out of the 50 DVDS written in a single day it did not happen once. The Duplicator is easy to use. If you adjust the burning speed it actually keeps it and doesn't default back to 24x when you shut if off. The only negative for me is that the DVD trays themselves don't seem to be that sturdy, more so on the fragile side so just be careful when putting in DVDs and taking them out of the trays. Love that it is a stand alone machine as well. It is quiet , it just has a slight humming when duplicating otherwise you don't even know it is on...it didn't generate excessive heat...it did not malfunction not even once while in use for the whole entire day. It has great options to write DVDs. It is very reliable as these DVDs are backup files and so each DVD is checked after duplication and can have 15,000+ files etc. written on it... and no errors at all occurred in the 50 DVDs duplicated...that is a better record than burning the DVDs all from the computer which I have done before, so I am talking from experience.