The adapter (cable length about 1m), along with a 12V 2000mA power adapter (cable length about 1.5m - both "made in China") delivered, the latter can be plugged directly to the SATA-side into the adapter. My SSD worked without power supply, the 3.5 "expected to HDD only. Is somewhat misleading in this context, the" Power "called LED. It lights up when the adapter is powered either via USB or via AC adapter, but says nothing about the state of the connected device from. Try is announced (especially in 2.5 "HDDs), the guide does not even mention the mE useless LED.
The processing of the adapter could be better, the USB cable turns including bend protection in the adapter, and the power jack while firmly but fairly obliquely used is not very reassuring.
But now to the operation (To be fair, I must admit that I have tested the adapter only under Linux, because my Windows system, alas, has no USB 3.0 port):
Booting an SSD via the adapter worked flawlessly.
The read and write speed did not quite match my expectations, I have the throughput of a hard drive and an SSD each measured several times for this purpose over the Delock adapter and under otherwise identical conditions directly on SATA3 port on the motherboard, here the averages:
HDD writing 142MB / s (173MB / s SATA3 port)
HDD Read 171MB / s (221MB / s SATA3 port)
SSD write 216MB / s (441MB / s SATA3 port)
SSD Read 175MB / s (384MB / s SATA3 port)
The disk thus achieved via the adapter about 80% of the via SATA achieved throughput, the loss is probably implementing USB / SATA owed. In the SSD adapter "the PS is not on the road" brings but in my opinion, only about 50% of via SATA achieved throughput is mE clearly not enough, even though I'm not sure if only the adapter is responsible for this (here would possibly SSD measurements of other reviewers interesting).
My personal conclusion: I'm keeping the adapter because it is primarily used only with HDDs, even if I have to expect that in future faster drives the adapter again becomes the bottleneck. The adapter in the rotating cable I will (as it did one of my Vorrezensenten) fix it with some glue.
Oh, since I had accidentally caught in semidarkness unter'm desk once the wrong port: USB 2.0 port on the adapter provides constant 39-40MB / s when reading and writing, which corresponds to my expectations (which theoretically possible with USB 2.0 60MB / s I've never seen).