I own multiple SKX variants and a Samurai.  To anyone who collects or is a fan of these Seiko autos the Sumo is a must for the collection.  The Sumo is a very comfortable watch and imo wears smaller than size suggests.  Some complaints on the watch only having a 20mm band are correct however this is where it gets its name (skinny legs with big body).  I will tell you out of all my watches this one ended up being my favorite, there is a special presence and feel about it that you will only understand once you have owned it.  Excellent finish and beautiful watch.