Summary: HDTach shows similar results and the iStarUSA HDD Dock tops out just under 30MB/sec and comes is slightly slower than other USB2.0 connected drives and enclosures, but when running under eSATA the only bottleneck is the drives speed itself. It's interesting to see that latency on the USB2.0 interface is only 0.2ms slower than the eSATA. You can see that the latency of the iStarUSA HDD Dock is very good when comparing to other 2.5" devices.
Pros: Attractive design, eSATA & USB2.0 interfaces, Rubber HDD covers to help protect against ESD? (Electro-Static Discharge)