Summary: This Buffalo portable CD drive has worked great for what it was designed to do. Back a year or so ago I would have given this a 4 or even 3 star rating because I am an IT pro and I discovered some of my clients were having issues with this drive mounting on their computer but when I realized that the reason this was the case is because of a usb port going bad on the laptop I decided that the issue that was being complained about had nothing to do with this product.
Summary: I've had this for a few days and it seems to work perfectly on a late 2013 iMac (the ones without the drive). I previously ordered the highly rated Samsung drive and had to return it since it wouldn't always be recognized. This works straight out the box, no drivers. I've burned about 15 DVD+R and have had no problems so far, with neither burning nor reading. It has two USB cords (one for auxiliary power) but I've been using it with just one and it works perfectly.
Summary: From the item page - "Compatibility Windows 7 (32/64-bit), Windows Vista (32/64-bit), Windows XP, Mac OS X 10.4 - 10.6 Mac systems natively support the CD/DVD portion of this product." I should have read the one-star reviews. My error. This doesn't work with an iMac, even with both usb plugs plugged directly into the computer instead of the 7-port hub I use. The Buffalo website doesn't answer email, or even have the Mac software available for download.