This second generation of Seagate hybrid drive is excellent! The average performance is on my computer 84 Mb / S and an access time 16ms. The question now arises over the term of this performance.En fact, I bought the first generation of the Seagate 500Gb XT, there a year: Perf 75Mb / S and a 18ms access time; Today on the same drive, I have allowed only one time transfer 58MB / s and access of 19ms ... Moreover, if this disk is quiet, it quite hot.