I ordered around the 5th of may, and received it on the 13th of May.
Compared to the psp, the Pandora's nub is much more fluid and does not give the horrible play the psp nub gives. Your thumb is also more secure on the Pandora nub and won't slip. In comparison it takes some force to move the psp nub. Although it sounds like nothing, but trying to move the psp nub slightly for awhile will ensure a cramp.