Let me just say that this Invicta model is a Force that has attracted positive comments from all that see it on my wrist. Looks more impressive than the small price I paid through Amazon.  It has not skipped a beat since I got it.  The only negatives that I can think of is the the two crowns rubs wrist to the point that there is a callus that had formed. Also I was surprized that this model did not have screw down crowns.