I'm still pleased with my Ambit3. GPS and He has been fantastic for running, ruckin, and hiking.
I do think it would be nice to have wrist Hr in addition to a chest strap. I started CrossFit recently and found the chest strap interferes with some lifts. It's not critical to know my HR but I've gotten in the habit of tracking my progress with it.
The nav feature has been nice when hiking. I've marked some hilltops as POIs when scouting. Makes it easy to find the same spot twice as the season changes, or keep track of which creek is which.