Re: gadgetbridge, my current model I purchased because it was available through them. $100 and great reviews online. Check out the Amazfit Active 2 if you haven’t pulled the trigger already. Alternatively, check out reviews from ‘The Quantified Scientist’ on YouTube if you really care about GPS/Sleep tracking and want to see how models stack up.
2-3 years ago, it would be great. Nowadays, I think it will just expedite the embrace of AI as an alternative, but I might be pessimistic.