I had the BLR10B and have owned other Sig rangefinders in the past but not their binoculars. Perhaps I am a simple minded fool, but I couldn't stand the BLR10B, and got rid of it. There are too many options and menus for the number of buttons it has and 9/10 times I would change the wind setting while trying to do something else. Then you have to press a bunch of times to get it back to where you had it before. People on here rave about Revic's App, but I much preferred Sig's offering as it was more straight forward. I found the Revic convoluted and couldn't tell if it was doing what I had asked it to and had a couple of incidents where it just wouldn't sync. The first until I left it overnight and another time where it needed a firmware update but I had no cell reception like I would if I were in the field. For something that is supposed to make shots faster, it sure seemed like it was trying to do the opposite. I also found the glass poor coming off a SLC 10x42. I was out playing with it birding, and looked at a seagull flying in front of an overcast sky and the chromatic aberration was so bad it doubled the gull. Was not impressed, I sold my SLC's and my 2400ABS to pay for it and regretted following the hype.