For years, I have an external Bluray. Now I wanted to buy an internal read-writable device, and for reasons of space. Delivery was promt. The packaging was impeccable. The installation was straightforward. The unit is quiet and very fast. Advantage: CD, DVD and Disc Blurlay- run very well, especially on a device .. Nachtreil: The optic lighting is not as it appears on the promotional brochure. Is abe not so very important. I would, though not cheap to buy this device, immediately.