Bests & Worsts Reviews from Amazon

Final update (read below to get full context): Three days after I was promised one, I still have not received a return shipping label from Jawbone for my exchange. I am really disappointed with this process and am returning my Jawbone to Amazon. I'm really frustrated because I think I am probably in the minority with this defective hardware but I don't want to risk going through this process again. --- I love the concept of being able to easily capture information about my day to day. Aesthetically, I think it looks better than competitors and that it is wearable rather than something you have to clip to clothing. After the initial release of the Up, I was ready to buy but held off based on widespread reports of hardware failure. After the second wave of the Up was released I was keen to give it a shot. Unfortunately, at least in my case, it seems the hardware problems have not been resolved. I have a Jawbone Up which I received and began using December 24. It worked for approximately 6 hours and synced successfully but now about five minutes after each sync goes into the "lost clock" condition with the LED just pulsing various clocks when the button is pressed. Occasionally the band will be completely unresponsive and no LED with display when the button is pressed. With only one successful sync, I really don't feel like I can comment further on the capabilities of the Up. Mine simply didn't function. The best thing I can say is that it is comfortable. I'm going to do one exchange before just returning. Will update if it's actually functional. Update 1: I've been working with Jawbone Support to secure a replacement. The customer support is courteous but it is a long process. Even after detailing the troubleshooting steps I have taken I was required to run the full battery again over the phone with a Jawbone rep before being allowed to exchange the device. Update 2: Jawbone missed the first window I set up to walkthrough troubleshooting. I was issued a reference number to use to call them at my convenience but this unfortunately also entailed waiting on hold for about 10 minutes. In the end it took about 20 minutes from placing the call to the rep from Jawbone (who was very polite and pleasant) to agree to accept a return of the band. They said it was likely a hardware issue based on the symptoms and attributed it to being possibly "roughed up" in shipping. I'll now be receiving an email with instructions for submitting my Amazon receipt then will be sent a prepaid shipping label. After they receive my old Jawbone, they apparently will be shipping me a new one overnight. I will update again after being able to use the replacement. Update 3: 48 hours after submitting a Amazon receipt I have yet to receive a shipping label but have submitted a request for an update from Jawbone.