Field test: from a 10 km run to a multi-day trail
The three French reviews read for this article cover very different uses, from urban easy runs to ultras, and they agree on the essentials despite different protocols.
Sport-Passion ran the most instrumented test, with a head-to-head comparison against a Forerunner 255 over several runs in town and in the forest. The LifeQ optical HR sensor, compared with a Garmin HRM-Dual chest strap, delivers results rated as decent for walking and running, with a few occasional dropouts flagged by the tester. The verdict praises the elegance and thinness of the case, the accuracy of the GPS and altimeter, and regrets the lack of maps and multiband GPS.
Journal du Trail used the watch for five months before publishing its full review, with a score of 4.25 out of 5. The standout is day-to-day reliability: battery life in line with the claims, a smoother interface than on the Suunto 9 Peak thanks to the new processor, and a running power feature judged consistent with the effort. The unanimous weak point: a 1.2-inch screen already lagging behind the competition at the time of the test, and even more so since Suunto itself switched to Amoled.
The Mangeurdecailloux blog, after two months on the wrist, is more nuanced: the tester, 47 at the time of writing, reports personal difficulty reading the 240 x 240 px screen mid-activity, while confirming GPS accuracy "noticeably better" than on his old Suunto Spartan Ultra and a battery that lasts a full week of training between two quick charges of a few minutes.
Opinions mainly split on screen readability: excellent in sunlight for Sport-Passion, decent for Journal du Trail, which calls it "noticeably outdated", more of a struggle for Mangeurdecailloux over long sessions. At RunMorph, we think this split has less to do with the watch than with the tester's age and eyesight: on a screen this size, a 3 or 4 data field layout is the most comfortable, and beyond 5 fields reading on the move gets harder whatever your age.

© Suunto, official photo used for editorial purposes