I like my fitbit flex and am considering either a newer fitbit bracelet (possibly named Charge or Surge) or an Apple Watch. I think that since the price difference won't be too bad (maybe $100?), so my decision will be based on other criteria. I think it will depend on whether or not the battery reduces functionality too severely on the Apple Watch and how well the pulse tracking works on the fitbit. I suspect it will work well on the Apple Watch. Anyone else looking at these two products?