I bought this as a Christmas gift for my husband.  It is very nice!  At first my husband thought it was broken, but he just needed to keep wearing it to keep in wound internally.  It came in the original Seiko packaging and was is definitely genuine.  It is very stylish and looks great!  Took it to a jeweler for a quick $10 fitting, and it was super quick and easy.
I am happy with this purchase and would recommend to anyone!