After my Glyph 1x1 unit broke after almost 9 years of intense CD ripping I thought all units were the same when I bought another boy lay I wrong, I first bought a device I had no idea the device has no editing function, I believed that all the devices offered seemed to have none, and the manufacturer or seller had not warned. Then I bought a Copystars machine, which was very light and hardly ever copied music CDs. Customer service was excellent but after the second unit went through the first I sent it back it just couldn't do its job. When I got this Produplicator machine it was called that for a reason, because it's a powerful machine, very well built and it cuts CDs. The Copystars block had problems like a knife through butter. The sockets opened and closed much smoother than the Cs device, the up arrow keys were of better quality, and programming the device was just like my Glyph, simple and very user friendly. I definitely recommend this device if you are looking for a heavy workhorse, this device. I'm sorry to say this to Copystars, they may have a buy recommendation alongside their product, but I can actually tell you this. Copystars owners buy one of these and you will have a real treat of much better quality. Editing is even easier. UPDATE 8/22/2015 "I've had this unit for over 2 months with no problems. I didn't change any of the copy speeds, I left it as it came from the factory and it worked fine, no problems. There are some new and copied music CDs that may take time to copy. Be patient but rest assured that there are no skipping and tracking issues when copying like I had with the Copystars device. If this device says you've been copied and you're OK, you can be sure that you are.
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