I've owned all three and they all measure distance just fine.I had problems with both the scout and nikon 400 eating batteries.Last year I found a website selling the leica 900 for $334 and this year I saw a link advertising them for $329.There is absolutely no comparison between the beshnell,nikon and leica.The bushnell and the nikon are almost useless in low light.The leica works very well in dim situations and is far superior in the clarity dept.Buy the leica.