I don't think that buckle compliments the 249 a bit. Way too big/thick and it's brushed. It would look far more at home on a 47mm Submersible, IMO. The 249 just can't carry it.
Having said that, I'm just not much of a fan of the buckle period...
I do not care for the buckle with the watch and I do not care for stitchless straps, just a personal preference. I do however like that buckle, that is cool.
That buckle's really not my thing, I agree it's different and that gives it something of a cool factor, but too big and cumbersome for my taste. I do echo Hooligans feeling though, if you are gonna mount it on a Pammie it should be a big, beefy, 47mm sub, that way the buckle doesn't overwhelm the watch.