I bought the FP02 after using my Zoom B3 for quiet a while. While most effects are fine without an Expression Pedal, Wahs, different kinds of Filters and some delays really need the option to adjust them by this pedal. The pedal can be used to control either Vol Input, Output, Balance, or a special parameter of a given Effect. Unfortunately you can't choose which parameter, so Filters are often only Freq, while other options would be nice, too. But that's a feature the B3 is lacking.
The shipping happened fast, as usual, and it came in a little box along with a cable to connect it to my B3. The Pedal itself is made of metal (I often got told it was made of plastic, I got a Metal one), and reacts fast to my movements, doesn't seem to loosen up or causes any nasty noises. Slipping won't be any problem, as it has a rubber sole to stand on.