I have given these a 5 star rating because the quality is first class, they are easy to adjust to your eye requirements and very comfortable to hold for long periods. The optical quality is excellent. I am no expert but viewing the Orion Nebula you can see two distinct and very clear light sources, my old Bushnell's of equal Magnification just showed a fuzzy image. I bought these mainly for watching Wildlife and they have not disappointed even in low light conditions such as Dawn and Dusk. The image has remained clear and relatively bright (conditions dependant of course). The sealed lenses have never misted up even when walking straight out of a warm house late at night with them and have remained mist free in the field. The eye cups are easily adjustable and click lock, once adjusted remain firmly set. The focus Knob is easy to use and stiff enough not to alter without your input. The Kneck strap is quite comfy but mine came with a free back harness which is easy to use and very comfortable, it also allows you to use the tension in the elastic straps to further steady the Binoculars, well worth having. The harness also stops the Binoculars from bouncing around when moving. The supplied Neoprene and Cordura case offers very good protection from hard knocks, although one minor gripe is that not having it's own straps you have to lay it on the ground when the Binoculars are removed. That said I normally don't take the case because the Binoculars are fully waterproof. Others have had issues with the eye piece rain covers falling off all the time, I partially improved this issue by only having them connected to the strap by one loop (the non split one) rather than both and they remain in place better. The main lens covers are excellent and having them permanently attached means no groping around for lost caps in the dark. I probably would not have purchased these at the rrp of £399.00 but getting them from Amazon at almost half that price has proven to be a bargain buy. I can highly recommend the Monarch 5's.