The speed of a USB 3.0 interface is more than impressive. I reach here (mind you with a 2.5 "disk with 5400 U / min.), A read rate of over 85 MB / s.
The whole system of Seagate is well thought out, although I would hope that the additional purchase of a USB 3.0 adapter would not be necessary (the disk is a removable standard USB 2.0 adapter supplied me). You might as well do without entirely on the 2.0 Adapter, as the 3.0 Adapter is backwards compatible. But this has nothing to do with the quality of the adapter, so at this point no deduction!
What is particularly gratifying is the fact that the cable is firmly attached to the adapter. Who ever another 2.5 "USB 3.0 hard drive had with mini-USB connector in your hands will confirm: Who came up with this connector, should be punished.
Conclusion: 5 stars!