Of these Data Doubler kit there are a few different here and some are of poor quality or which involve an unpleasant "mystery", namely that that they are not suitable 6G = SSDs do not work or if, only at half power and unstable. I can only advise anyone who is interested very much to invest this 10-15.- more because 29.- are really not too much that here is really everything. The quality of the product is really good and it works every (SATA) SSD perfectly as it should. Achieve with my Samsung 850 Pro specified the full 500+ MB / s as Samsung and everything is super stable, just like the original SSD from Apple. The product is highly recommended.