In reality, speed moderate maximum SATA II. To be expected (up to 239 MB / s). Otherwise, the whole package works. The SSD has been properly recognized on USB 3.0 port and for the price (about 10), this external SATA II. / USB 3.0 solution (if you need only SATA II.) Absolutely recommendable.
(For lack of SATA III. Support, due to the opposite false claim that a deduction of points.)