Don't bother, I did in the Spring and it was crap.
Despite living near a tidal estuary I'm often, apparently, some 350 metres above sea-level.
The watch isn't waterproof. It's on the large size and like having a grappling hook on your arm – if you root around in the depths of your rucsac for something you extract all the other contents out on withdrawal. The watch constanly resets itself and needs recalibration if more than one button gets pressed at once (which invariably happens when you try to dig some spare change out of your pocket, a big enough challenge in itself). There's no stopwatch, or countdown mode. Luckily, the battery life is atrocious so I'm happily no longer wearing mine. I've gone back to a similarily priced, waterproof Casio. The compass is fairly accurate though, but if you've every tried following a course from a compass watch then you'll know that nothing beats a good old hand held, traditional compass.
Review concluded 😉
Lidls trekking socks on the other hand are blinding. More due in at stores around the country this coming Thursday 🙂