Ordered this drive/enclosure/tools kit on Friday night/Sat. morning of Memorial Day weekend, and by the following Friday a.m., I had it in my hands! Got this because my internal drive on my MacBook Pro (5,1) was getting kinda full (280-290GB of 320GB).
First thing was to put it together and see about formatting the Hitachi 500GB (16MB cache) drive. (I decided to do that and clone my internal drive first, and then later swap the drive in, using the OWC toolkit that comes with the drive & enclosure) That was easy - even if I did read the directions (pretty quick to do that, too) - and then I hooked the enclosure up to the MBP with the USB2 mini-cable that was supplied. Fired up Disk Uitility, and it recognized the drive right away. (Had me wondering if Hitachi had begun pre-formatting their drives for Macs... ;-)
The drive formatted ultra-quickly, and I decided to go ahead and clone my internal drive over to the new one, using Carbon Copy Cloner. That did take some time (well, it was a pretty full drive inside, and these larger drives store more stuff than older ones that we used to use), but no problems (other than a little impatience on my part).
The OWC Express enclosure looks great sitting next to my Mac Book Pro, and I figure that before long I will use the OWC toolkit to move the newer drive and swap it for my current internal drive (as it reaches close to its maximum). It is a very quick drive, and is very affordably priced. Another nice thing with the drive is the great support - if I have any questions or problems, I know that OWC's support team is great for answering them. (Though I've never had major problems with anything I've purchased from OWC)
OWC is great because their site can tell you when you're looking there whether a drive/memory/other accessory items will fit/be right for your Mac model. Even in the rare occasions when I can't find the info for sure, the support techs can give me an answer by email (or phone, depending on when I am checking...), and there's also live chat (which is now available all the time). Even if live chat is all tied up with other people, you can leave your question and they will get back to you with an answer. Great support!
I have bought many items from OWC, allowing me to increase the capacity and capabilities of Macs that I have owned, and being my primary source for expanding my Mac, or questions about 'Can I do this?', 'Is there a drive that will fit in my model?' and others. If OWC doesn't have the item I'm after, they may know who might - but it also may be that it isn't available much of anywhere. Great folks, very reasonable prices, super support, well worth dealing with!