Long-Term Fitness Tracker Users - Reliability, Accuracy & Value

Is there a clear winner for the best fitness tracker, or not really? I've been noticing that fitness tracker recommendations seem to depend heavily on who you ask. One person will say there's an obvious best choice, while someone else with completely different priorities will strongly disagree. For anyone unfamiliar, fitness trackers are wearable devices that monitor things like steps, heart rate, sleep, workouts, recovery, and general activity levels. Some are simple bands focused on health metrics, while others blur the line between tracker and smartwatch. People usually start researching them when they want more insight into their activity, training, or overall health habits. I've been researching fitness trackers pretty heavily for a guide I'm putting together. I've gone through reviews, comparison articles, expert rankings, and videos, but real-world experiences often tell a more complete story. Reddit discussions tend to reveal long-term reliability issues, battery life realities, tracking accuracy, and whether people still find the device useful months or years later. I'm trying to make the recommendations as accurate and genuinely helpful as possible rather than just repeating whatever ranks highest on review sites. A few things I'd love to hear from actual users: Which fitness tracker have you used the longest, and how has it held up? Was there a tracker you were excited about that ended up disappointing you? Which metrics do you actually pay attention to after the first few months? Are there any highly recommended trackers that you think are mostly hype? What surprised you most after living with a tracker long term? Which tracker offers the best balance of accuracy, battery life, and value? Who do you think would be better off skipping a fitness tracker altogether? From what I've gathered so far, fitness trackers seem to fall into a few broad categories: simple activity bands, recovery-focused wearables, GPS-focused fitness watches, and smartwatch-style devices with fitness features. The factors that come up most often are tracking accuracy, battery life, comfort, app quality, and whether the data actually leads to useful behavior changes. One thing that feels a bit marketing-driven is the sheer number of health scores and readiness metrics some devices promote. A lot of users seem to end up focusing on just a handful of measurements while ignoring most of the extra data. I've also noticed that people sometimes chase the most feature-packed device when a simpler tracker would probably fit their needs better. The strongest pattern so far is that consistency, comfort, and ease of use seem to matter more than having the longest feature list. I'm trying to put together something actually useful and avoid recommending devices that look impressive on a spec sheet but don't provide much value in day-to-day use. Would love to hear real experiences before I finalize anything. Anything I'm missing here? Curious what people who've actually used these think.