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Let's also not forget no one has held one in their hand to see how good they really are
Well that's certainly not true. For example, here's a respected watch guy, who was at the Apple announcement in September, describing the link bracelet:
"And that leads me to my next point. Apple absolutely, positively, indisputably NAILED its straps and bracelets. In addition to offering a bevy of options from leather to fluoroelastomer to link bracelets to Milanese, it is here that you really see how much attention Apple was paying to the way people wear watches, and the how bad existing options were.
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Then you have the link bracelet. Did you know that the entire thing is sizable with just your own hands, no tools required? All you have to do it press on the center link from the rear of the bracelet and a link pops right out. It reminds me a little bit of how IWC's Aquatimer straps attach to the case, with a center release button, but here it's for every single link. Additionally, the deployant (did you notice Jony Ive called it a "deployment" buckle in the video? Cute.) is again so slick, where it actually folds over itself to be far thinner than a traditional bracelet clasp."
Source:
http://www.hodinkee.com/blog/hodinkee-apple-watch-review
Cheap link bracelets are made by stamping shapes out of sheet metal, folding them into little hollow link pieces, and pressing pins into the holes to keep the links together. Then a lackluster pass over a buffing wheel, if you're lucky. The edges are sloppy; the clasp is thick, loose, insecure, and far from durable.
Quality link bracelets have pieces machined from solid metal stock, hinge pins welded into the links where possible, better overall precision and finishing. The clasp is thin, rugged, and reliable.
Apple's link bracelet
looks (in pictures) like it will be on the higher end of the scale, though not in the hand-made, hand-polished, ultra-luxury range. I've only seen very favorable reviews of the bracelet, the deployant clasp, and the easy size adjustment mechanism.