It seems to hold well and my phone has never fallen. However, when I move, the base makes a slight wobble, which makes me a bit anxious. For now though (6 months of use) it has served me just fine without any accidents.

By far the best value for money base!
The phone doesn't budge at all since the design with angular grip on the edges prevents the phone from bouncing up in potholes, rocks, stairs, etc. and at the same time, the side buttons of the phone do not touch the base.
Excellent construction quality and materials.
Perfect adjustment and right in the center of the neck, angle tilt adjustment, horizontal and vertical adjustments.
Even with a silicone case, it fits perfectly any smartphone.
The base is quite lightweight and very discreet, with a beautiful and smart design as well as high-quality materials.
Definitely worth the money it costs and more.
If I used a phone on a bicycle, I would buy it with my eyes closed!

While it seems that they have done a good job with the design of the product (e.g. the attachment of the mobile phone is very stable, it supports a wide range of sizes and allows for multiple adjustments in terms of orientation - portrait / landscape and device position), they have overlooked two very important features, so the product fails in essence: 1. the screw connections loosen due to vibrations during the ride (this happened to me on the first ride after 3-4 kilometers, and of course I had tightened them well beforehand because I was on a familiar route - having heard a similar experience from a friend, I was aware and noticed it in time, stopped and fixed it - in another case, the phone could have fallen off along with half of the mount on the road..). For those who already have it, they can solve this issue by using thread-locking adhesive on the screw connections (there are a total of 3 - do not use it on the phone attachment screw). 2. I believe that the support's durability is insufficient (not necessarily that it will break due to vibrations, but they cause significant oscillations in the mount). The arm should have been more sturdy. (for those who already have it, the oscillation can be reduced if you adjust the various screws so that the center of the phone is directly above the point where the arm supports the grip of the phone). However, it is not the final consumer's job to solve such issues that are supposed to have already been addressed in the product design, so it is preferable to choose a better-designed and reliable mount.