The first thing they mention is the "great" battery life and it is still only just over 2 days, great.
(Cue joke about triathletes not being serious about cycling.)
Data accuracy most certainly is not in relation to GPS which often cuts distances on the Apple Watch.
Tracking performance on the previous Apple Watch Ultra 3 was "solid" in an independent test. A little worse than competitors in some activities, a little better in others.
https://www.dcrainmaker.com/2025/11/apple-review-ultra-3-in-...
In any case, it’s longer than the AWU by a long way.
Apple Watch is probably Apple's shittiest product today.
Pedometer apps that pull from Apple Health and offer Watch face complications are a dime a dozen in the app store.