So Apple have just announced you can preorder the watch on the early morning of the 10th, yet that is the same time you can arrange for an appointment to try it out. For those of us who actually will need to try the different sizes and bands before making a final decision, is it likely to sell out? For a jewellery item I don't want to make a blind preorder before trying it on first. Are you guaranteed a pre order If during your fitting appointment you decide to buy? Or will you be directed to the website only to be told it's sold out for launch day? Apple haven't exactly been clear about this..