Currently the best price available by at least 15%. I've been using the Silva Ranger series since my DofE Award days some 25 years ago, and whilst there are 'better' mirror-sighting compasses available, you won't get them for anywhere near this price.
Yeah, you can use a phone app or a digital compass, but if you're away from civilisation for a while, you can run out of battery power fast. I'll spare you the lecture on why you should always carry a paper map and compass as I'm sure it's pretty obvious ;)
Some info from the Sila website:
Silva Ranger S features DryFlex™ grip for easy handling and comes with a use-anywhere declination scale inside the capsule. A base plate map-measuring in mm and scales of 1:50,000 and 1:25,000. Ranger S has the additional benefit of 45-degree angle assistance on the mirror sighting function. A go-anywhere tool for serious compass users.
Detachable safety-release lanyard
Declination scale inside capsule
1:25k, 1:50k, mm, inch
Mirror sighting, with sighting hole
Oh, and don't pay any heed to the reviews on Amazon as the 2 I own are in great condition despite having been used extensively around Europe, and the 'N' on the needle definitely glows.