Pros: I've had great success using this external drive on both a Macbook Air w/ os 10.7 (Lion), and on a crunchy old Dell c640 / win XP. In each case, it only needs 1 USB connection to read or write. No coasters or problems reading/writing (yet). It's been dependable and meets my needs, and at a great price.

Cons: It's a little noisy, and maybe not the fastest drive.

Pros: low price.

Cons: difficult to get working. Upper conical spring would bend off to the side and not make good contact with the battery harness. Needed to re-bend spring, and not tighten the connections too tightly. Does not feel durable, could fall apart.