Has anyone used Pawtec UltraSlim External USB 3.0 Slot-Loading Blu-Ray Writer? http://amzn.com/B00E7DQDJI It seems like a good alternative to Apple USB SuperDrive; it looks like it has a similar design and a slot instead of a tray, plus it plays and burns Blu Ray discs. On the other hand, it's pretty expensive at $159.99 and I cannot find a review on YouTube. I can't remember the last time I've used a CD or a DVD, but I will be getting a rMBP soon and I want to get a disc drive just in case. So, it is worth getting this one?