The binocular experts can preach their gospel regarding advantages and criticisms of various binoculars (and some of them may know very well what they are talking about), but the best way to see the difference between good ones and bad ones for many of us is to use a good one extensively for a day or two and then try a lesser one that you thought was good. You'll see the blatant difference(s) immediately.
So true.....
Too much time looking through alpha type binos kinda' ruins a guy when he tries to go back to something else.