The Plugable (USB3-SATA-UASP1) USB 3.0 dock is a bit different than the most docks because the drive lays flat instead of standing straight up. I compared this to a Thermaltake BlacX Duet 5G. One of the first things I tested was how the dock and drive behaved when I suspended the computer. With the Thermaltake the dock and drive stayed on and spinning. With the Plugable the drive powered down and the dock indicator light turned from blue to red. I was quite astounded with the difference in the results when I tested both docks. I tested two drives using the built-in disks utility in Ubuntu.
Update: I tested the dock to see if it supported SMART data based on a question posted in comments. It does, indeed, support SMART.
The results were roughly the same for the traditional HD, but the Plugable dock got significantly better read results than the Thermaltake. The performance is even more amazing when you consider that the Plugable is $29.95 vs the Thermaltake $57. The dock, as you can see picture below, works with both 2.5″ and 3.5″ drives.