I used tis enclosure to house the HDD from my XBOX360 Elite (so it could be used in my new XBOX360 slim). Enclosure was a little difficult to "click together" after installing the HDD. After the first time the enclosure was inserted and removed from the XBOX360 slim, the enclosure needed to be "clicked together" again. I'd consider this a very minor irritant.
The product does include the locking mechanism to hold the enclosure in place inside the XBOX360 when transported and works flawlessly. This was a very nice touch provided by the HDE enclosure. Overall the product does the job and does the job well.