Hi! Guys I'm thinking of getting the F3. Are you all happy with your watches? Is it really better to get the HR than the normal version? Currently use a fitbit charge HR and I like the fact that I do not need a band around my chest... btw have you guys seen what massive sale amazon had on the f3? Went for R5499, but that special is finished. I have read all the reviews. Looking forward to hearing your opinion.