I've had my SBSS for almost a month. I've showered, scrubbed, had it hit the floor, bumped walls and my dog has even had his teeth on it. So far it still looks smooth as glass (although I am careful). It's my first SB watch so I did get AppleCare just in case.
Also, to the person who said you can't use AppleCare for scratches, etc., I have done just that in the past. You get two "no questions asked" replacements with the Apple Watch plan, for a small fee. Apple also tends to lean your way if you have problems with any of your bands. They've replaced a Leather Loop and a Mlanese Loop for me already. I like having it myself.
Also, to the person who said you can't use AppleCare for scratches, etc., I have done just that in the past. You get two "no questions asked" replacements with the Apple Watch plan, for a small fee. Apple also tends to lean your way if you have problems with any of your bands. They've replaced a Leather Loop and a Mlanese Loop for me already. I like having it myself.