Pros: Did exactly what it said it would do. I needed to do a simple "1 button" clone of a laptop hard drive that had reported a SMART event of an impending failure. Loaded both the old (250 gig) and new (500 gig) drive, turned on power, hit button, and in less than an hour, it was cloned. Popped in new drive, set a partition for the additional space, and all is good. Chose this one because it had better reviews than some of the cheaper external docking station/duplicators.

Cons: So far none.... time will tell.