When selecting smartwatches, prioritize runtime, health and sensors, connectivity, and display/durability. Here is how this product performs:
1.
Runtime (42 hr normal; 72 hr low-power; GPS + HR) : As a premium-tier device, the stated ~42h runtime (72h low-power) aligns with flagship smartwatch expectations where bright always-on displays trade battery for features. Compared with premium benchmarks this is typical to slightly better for full-feature wrist OS devices, and the renewed price makes the effective runtime/value more attractive.
2.
Health & Sensors (ECG-capable sensors; SpO2 monitoring; sleep tracking) : This matches premium expectations of comprehensive sensors including ECG-level features and continuous HR/SpO2. It is noticeably in line with premium benchmarks for health capabilities and is a core strength justifying the higher price band.
3.
Connectivity & Compatibility (cellular eSIM; built-in GPS; Wi‑Fi & Bluetooth; iPhone compatible) : Full cellular plus built-in GPS and Wi‑Fi is typical for premium smartwatches and stronger than mid-range offerings. The Apple ecosystem and cellular support are consistent with the brand effect that sustains premium pricing.
4.
Display & Durability (Always-On LTPO3; 1.77 in; titanium case; 100 m water resistance) : High-end display tech, titanium construction and 100 m water resistance place this clearly in the premium range for build and durability. These materials and ratings align with premium benchmarks and help justify the price despite the renewed condition.
Deal price at $639.99: sits in the premium band for smartwatches but below many flagship listings. It is priced lower than its recent 30-day average of about $699.21, and the renewed condition helps explain part of the discount; consider warranty/return terms when buying renewed.
This Good Deal fits buyers who want a full-feature smartwatch with advanced health tracking and durable titanium construction without paying new-list price. Confirm the renewed warranty and return policy, and buy it if you value Apple ecosystem features, built quality, and cellular on the wrist.