That looks really thick and clunky. The cool part about the modern buckle is how thin an streamlined it it.
My biggest fear on the Watch was on closures because they clunk against the desk or laptop when I'm typing. So fart the bands I've tried have been very low profile in back. The sport band just had the one metal nub. Leather loop and Millenese have nothing in back, etc.
I'm quite happy with the sport and my leather loop arrived yesterday but I'm away and will get it at the beginning of the week.