I’ve got 5+ and it’s really quite excellent (for my needs anyway)
I run as much as I cycle & it’s perfect, especially now with the new Spotify link so I can download music & play through my Bluetooth headphones.
No need to carry a phone.
battery life is between 5-7 days depending on how much I use the sport tracking.
Heart rate measurement is as good as identical as chest band too (did a back to back check with my edge 810)