I too was interested in that watch. The software looks a bit fancier than my PineTime. It turns out that the PineTime is actually amazing based on battery life alone. It currently costs ~US$27. It's slightly less chunky (37.5mm x 40mm x 11mm) and a bit better looking. Has BLE, heartrate, 3-axis tilt sensor and haptics but no speaker. Battery life has been consistently 8 days between recharges for the last year or so.

Software is okay although I occasionally get annoyed by Bluetooth connectivity issues using Gadgetbridge. But part of the reason I bought it is that it's hackable, so the software is totally replaceable.

I think sometimes you get more than what you pay for. And sometimes you're paying for shareholder dividends and outrageous CEO salaries.