Hello, I am a newbie here. I have been following macrumors forum but just created an account to ask some questions about Apple Watch. I have a fitbit charge HR and have been using it everyday since the first day I bought it. I am not sure should I upgrade to AW2? Anyone in this forum that has both devices? Which one you prefer and why? I am also a swimmer and want to take advantage of AW2's swim proof. However, many articles in the internet stated that it is not totally "water proof." Any opinions and input are highly appreciated.