I purchased the MagView B1 for my older Vortex Viper HD 10X42 binos. The first issue I had was on my iPhone XR was there were no instructions to tell you that you need to mount the magnet to your case a little off center vertically more toward the lens end. So I had to use a heat gun and remove the magnet, clean the case and reapply. Second issue was with the adapter, simply put I had hell getting it to stay on the bino eyecup!! First without the spacer strip, second with the spacer strip. I tried mounting it per instructions 3 different times and each time it just came off the first time I tried using out of my harness. Then the spacer strip came unglued making the adapter useless, to which I had to use strong chemicals (acetone and goof off) to get old adhesive off. Customer support DID do a good job of working with me and sent a new spacer strip. Once I cleaned the adapter, mounted the strip to the adapter, cleaned bino eyecup w denatured alcohol, and reapplied the adapter to the binos……it seems to be on for good!!!
Now I will say this, I really like the product, I think more instruction for possible problems would help. CUSTOMER SERVICE was very good throughout which I appreciate. Now that it seems to be on very good I'm anxious to learn to use. Again this is a WAY cool product and seems well made.