I love the stem mount
I love the stem mount on my road bike. The case is also easy to hold on to, relatively light and super protective without being bulky. I'm getting another case, so I can leave one on my bike and have another for everyday use.
I've used the stem mount case on my bike for about 3 years on an older phone. Upgraded the phone and needed a new case. Stem mount still works perfectly. Best way by far to mount to the bike.