Hmm I would love one but charging it twice a day just seems cumbersome.
I am used to an amazfit bip which gets charged every few weeks and is always on my wrist otherwise :/ The features are poor and the software is flakey though.
You don't charge it twice a day. For the last few months I've worn my S5 when sleeping and throughout the following day, it gets charged for 1-2 hours when I'm sitting watching TV before bed. The only time I top it up is if I'm going to do a long distance afternoon run or walk but it usually still has enough juice left.