Ordered to use with my macbook air and it works fine off one USB connector despite another reviewing stating it doesn't. They obviously didn't test it. Despite this, it is made of very flimsy plastic. So if the unit is placed on a flat surface and you attempt to press the open tray button with your fingers placed even lightly on top of the unit to stop it slipping, you will find the thin plastic top flexes and interferes with opening as well as closing. The CD/DVD tray itself is very poor quality and moves considerably to the left and right, not to mention not sliding in and out very well. Don't even consider picking the unit up if you have a disc in it as it will sound like it is shredding the disc.
I had previously purchased the Samsung SE-S084F External USB 2.0 Slimline 8X DVD Writer and it is well made, solid and certainly worth the extra money. Personally, I would stay away from this Samsung SE-208AB unit and spend the extra money. As the saying goes, you get what you pay for and this unit is poorly made. Your main question should be how often you intend to use it, because once in a while may be fine, but if you rely on it regularly, think twice.