Hi All, Actually received my S5 on Tuesday the 8th. So far it is great!! Only issue is with the Otterbox Defender Case I purchased direct from Otterbox. Power button in the case will sleep and wake the phone, but to turn it on or off is not working. I'm trying to work with Otterbox to resolve this issue. I liked the Otterbox case that I used on my S II Skyrocket and had none of these issues. Hopefully the matter will be resolved soon.
As for battery life, I charged it Tuesday morning to 97 % while activating and setting up the phone. It is now Thursday afternoon and I still have 34%. I do turn off my phone at night, but I've been using it fairly heavily for me so I'd say this is great. My S II would only go for one day.