I received my 42mm SS with Milanese Loop on launch day, and fell in love. Quickly I realized that I was missing notifications when I wasn't paying full attention to my wrist or moving around. It dawned on me that the haptic feedback was weaker than I remember from my try on appointment. Even prominent feedback felt weak, sort of like a battery powered fan that's running very low on power. I chatted with Apple support and in no time they had a box shipped out to me with a special way to pack the watch... What can only be described as two pieces of strong cellophane encapsulating the Watch and suspending it in a way that won't allow any damage to happen. The box came with Apple Watch specific service instructions and instructed the user to remove the band and keep any accessories. It shipped with a prepaid, pre-affixed Fedex overnight label and arrived at the service center today. Within minutes they marked it as "service completed" and then "Product replacement pending." This means that the Taptic Engine must have been faulty. The estimated turnaround time is 3-5 days. Overall, very easy. Let's hope the replacement works as it should, and it's a nice reset from the hairline scratches the SS had amassed in only a week... Something I'm not crazy about.