Very nice product, the silicon strap is awesome. But be careful. This one does not accept metal bracelet with endlinks, only straps.
Everything was said about the quality especially compared to the price. The bracelet is top. I prefer a rubber than a very bad metal to put in the trash bin as on the 1644. In addition I'm happy with the quick fasteners of the bracelet. But I would have preferred a loop. Like many, surprised by the small size of the case. Especially I have pretty big wrists. It is limited but acceptable. The back is a little thicker than on the 1644 so it amazes me that they say even thickness. With the black background of small dials we do not see the needles well. Less well on this point than the 1644. For other differences it is minimal: back not engraved the same, logo crown polished and unbrushed, dial very slightly more enveloping around the crown. Light really bad but not a surprise, said in all comments.