I am absolutely delighted with my Omega Seamaster chronometer.  It is well within COSC standards, gaining around 2 seconds a day.  I love the attention to detail, such as the "wave pattern" on the face and the "Seamaster" logo on the back.  It's a very comfortable watch, and not too large for a small wrist.  I love the screw-down crown which really helps it to achieve 300-meter water resistance.  This watch is simply beautiful, and it's a watch that can be passed down the generations, unlike a quartz watch whose electronics will be gone before too long.  I purchased my Omega through an authorized dealer; I think purchasing a "gray market" Omega is simply nuts.  I know that Omega will honor my warranty, because I have the warranty cards!  Finally glad that I indulged myself with an Omega.  This is one purchase that is definitely worth it!