First off, let me say that my eyesight is not what it used to be - I need 2.0 power reading glasses. Having said that, the reading of the azimuth through the prism was not possible for me without glasses, and was difficult with glasses. A larger prism would be better. This compass functions as a card compass, but pretends to be a baseplate compass - I think it falls short on both counts. It is not feasible as a baseplate compass because the compass card blocks any vision of the underlying map, and the view of the azimuth through the prism is difficult unless one has excellent vision. The clinometer on the reverse side is labeled as "declination", there is however, no declination correction that can be set. It seems they used part of another compass to get the clinometer functionality in there. I wish I could have something better to say about this compass, but it is what it is. Oh, and I almost forgot - the compass has graduations for mils, but no way to read them through the prism - one can see them by looking down from the top, but what good is that? It would be better to not have them at all if they cannot be viewed through the prism. On top of all that, the directions that come with the compass are really poor - it seems that they were translated to English by someone who doesn't speak/read/write English very well, and it shows. Sorry to be so negative, but I have to tell it like it is on this compass.