Mikhailtech posted a review on the Eagle Tech M Series HDD Enclosure

Today we'll be looking at our second external HDD enclosure from Eagle Tech. The M Series differs from the W series in two ways. First, it only supports SATA drives. Second, it offers both a USB2.0 and an eSATA interface. It also features a very innovative method of installation, the first we've seen of its kind. How does it perform? Let's find out.

Eagle Tech M Series HDD Enclosure Review