Been using a Garmin bracelet one for a while (Vivo?) which was good for the red line appearing to remind me to move, and also count steps.
Then I had to go for a medical, and there was some concern of my heart beat, so I decided to get one with a HR tracker built in.
So I got the Fitbit Charge HR.
I like that it can track pretty much everything except gps.
I like the built in HR function, especially for monitoring sleep levels, as it records the resting HR, and I can see where different lifestyle events have different effect. (Go to bed drunk and my resting HR is higher)
I wanted a Garmin Vivoactive, (the watch one) but didn’t want to have to put on a HR strap each time, as I’m using it for more lifestyle than training.
Like you, I have a 910 and use it as you do.
Daily wise, the Charge HR is my daily watch, lasting around 5 days between charge (2 hours)
The only downside to it is, is that it isn’t waterproof, although the wife accidentally wore hears into the shower once, and it survived.