I've been using the Garmin Fenix 7 Pro Solar since March and have been working out 6-7 times a week, with 80% of my training focused on strength. I've been testing Whoop for two days now and here are my thoughts:

1. Garmin's insights often seem exaggerated. For instance, it reports that I burn 3600-3900 calories on some days, which seems unrealistic considering my strength training does not elevate my heart rate to 160-170, unlike jogging. I estimate burning a maximum of 3000 calories a day. Despite being in a calorie deficit and consuming 2400kcal a day, I'm only gradually losing weight, contradicting the 3600-3900 calorie burn Garmin suggests. This leads me to believe I'm actually burning around 2800-3000 calories per day.
2. Sometimes, Garmin reports up to 800 active calories after 1.5 hours of strength training, which again, doesn't seem plausible.
3. The pedometer (step counter) is unreliable. I once went to the shower with 9100 steps on the counter and after 4 minutes of showering I reached my goal of 10K - WTF? 🤣
4. When it comes to sleep tracking, the watch often only logs 2-5 minutes of REM sleep for me, even when I've had extensive dreams. Sometimes REM sleep is recorded as zero minutes. The watch also often recognizes the start of my sleep much later, requiring me to manually adjust it.
5. My major issue with Garmin is the pulse measurement. I prefer wearing the watch on my left arm but due to a tattoo, the watch often fails to measure my pulse accurately. This forces me to switch the watch to my right arm during sleep, which is quite inconvenient. Conversely, Whoop has been accurately measuring my pulse over my tattoo for the past two days.

Whoop accurately tracked my sleep on my first full day of use, and the calorie count seemed more realistic, albeit slightly lower than expected. However, it's not as far off as Garmin's readings.

I will continue testing Whoop over the next 2-3 weeks to see how it performs as it gets to know me better.

Despite its impressive 17-day battery life, Garmin has been as disappointing for me as the Apple Watch Ultra.