They look great!
And well.. the problem about the upgrade strap for me is that they are just too short.
I payed 100$ extra to the Gen Croc strap for the 288K and it looks good.. but it's like 115/75 long ... I mean it's a short strap and my wrist is not very big but I need 130/80.
So from now on I won't buy any upgrade rep strap unless they specified the lenght and thickness.
hope it fits well to you!!