Day one with the Coros Dura

New head unit on the bars this morning, and before anyone reaches for the comments: yes, this is a first-day review, and yes, a pinch of salt is 100 percent needed. But I'd argue first impressions are worth writing down precisely while they're happening, because day one is the day every customer actually experiences. Nobody unboxes a device with three months of muscle memory already installed. So here's day one, honestly, before familiarity sands the edges off.

The context: I've been on a Hammerhead a long time, so my eyes and thumbs have habits. Getting used to a new interface is always a challenge, and the Dura makes you work for it a little. The screen is smaller than my Hammerhead and the metric layout is different, which means the first hour of any ride is spent glancing at the spot where a number used to live and finding a different number there. That's not a flaw, that's moving house. It passes.

One thing I don't understand, though: the tiny box at the bottom of the data screen. It's small enough that it's hard to even see on the move, which makes it a bit useless, and customisation won't let you change its size. Every millimetre of a bike computer is real estate. This is a strange little plot to have built on. If Coros are reading, that's an easy firmware win.

Now the good, because there's plenty. The thing looks great on the bike. And the dial is the star: swiping through screens with it is easier and faster than prodding at glass with sweaty fingers, and within an hour it already felt like the obviously correct way to do this. Some ideas are just right.

Maps are cool. I haven't figured out the zoom in and out properly yet, which I'm filing honestly under "me problem" rather than device problem. Day one, remember. That little minimally so easy to clock.

The feature I love most, predictably: the nutrition alerts. Little nudges to eat, built into the head unit. More of this everywhere, please, because the number of riders who ruin their own rides purely by forgetting to eat is enormous. My wish list: a water alert alongside it, and some actual customisation, because right now there's zero. The bones of something brilliant are there, it just needs opening up.

Then there's the headline feature: solar. Full disclosure of my extremely rigorous test conditions: a small ride, an hour and a half, in the morning, and at the café stop I left it parked in the shade, because that's where the table was. Amateur solar-farm management at its finest. Result: 2.7 percent battery used, 0.6 percent gained back. On a short morning spin. I'm not going to extrapolate wild battery claims from one ride, but the napkin maths points somewhere lovely, and this is before I've done anything properly long under full Spanish sun. I'll report back when I have.

So where does day one land? Honestly, I already know I'm going to love this device long term. It's built for the rides I love most: the long days, the adventures, the ones where battery anxiety usually sits on your shoulder the whole way. But I can also already tell you where it won't go: the hardcore structured workouts. For intervals and proper training days I'll still reach for the Hammerhead, whose layout my eyes can read mid-effort without a single thought. Different tools, different jobs, and no shame in a two-computer household.

Day one verdict: good looking, clever in places, mildly baffling in one or two others, and partly powered by the sun, which I refuse to stop finding delightful.

Proper review when the device and I actually know each other. For now: promising first date.