My experience, the Universal Bike
My experience, the Universal Bike Bar Mount is not very “universal”.
The bar spacer/adapters that came with the mount did not fit my bike’s handlebar (2016 Canondale Synapse with stock handlebar) - the included adapters were either too thick (could not close the mount to tighten the locking bolt) or too thin (mount would spin loosely on the bar even after tightening the bolt).
I ended up having to modify one of the included spacer/adapters in order to get the mount secured on my handlebar.
I have also found it difficult to consistently secure the phone/case to the mount. It feels like it has snapped on securely, will not move any further, but after riding for a few minutes it will vibrate loose because it was not actually fully locked on.
In hindsight I should have purchased the “Over The Top Bike Mount” instead.