I like B leads, they make such a nice, bolder line than HB. But often they snap too easily. These leads are the best I've ever used. They have the smooth, bold feel of normal B leads and yet they do not snap nearly so much. Highly recommended.
It worked well for getting data off an old hard drive that I had replaced with an SSD. The caddy is fairly ugly and wouldn't protect the disk e.g. for transportation in a bag, but it works well as an occasional use product that will spend most of its time sitting on a shelf.
This product works well with my iPhone 4S. It is small and light so I can keep it in my bag at all times for emergencies. However my one came with a broken iPhone connector. I did not bother to send it back as I had a spare iPhone USB cable which works instead, but it's still a little annoying.