Always going to be when you've just spent 5 figures . .
Googling the Haibike brings up a few retailers in various European countries so hopefully it gets rolled out to more.
Definitely a market "disruptor" with that spec which is possibly the reason for any negativity, but looks like a great buy capable of handling anything an average rider is capable of riding. If they brought out a belt-drive version with integrated MGU they'd dominate the market.
First ride for 6 weeks after an OTB and a couple of days in hospital. Marvellous even though it was chilly, plus an accident certainly makes for a nervous ride down anything interesting LOL.
Go for a short ride in turbo, or lift the rear off the ground and put a cable-tie round the handlebar switch to engage walk mode (make sure the pedals are clear and it's secure!) - this takes a lot longer than a short ride in turbo. Anything less than 80% would be my aim.
The Amazfit is great for tracking time/distance metrics plus a downloadable GPS track, but AFAIK it only shows the battery % of the watch, not your bike. If you can get it to show bike battery level please post how.
Buy a mechanical 24hr timer and charge it for the recommended time before you ride, that's what I do. Bike gets charged to 60% after a ride and stored. On the night before a ride I set the timer for 2hrs starting at 6am (5hrs is a full charge, so to add another 40% needs 2hrs).
100% means it's fully charged, anything else is pretty irrelevant. Just like the rest of the bike won't be like new - brake fluid, chain/gears, suspension, bearings - all used but it still works OK for most of us so 100% ready to go until things need replacing or break.