I’ve used the K&F Concept 3" Suction Cup Mount a few times now, and overall, it feels fairly well-built and solid. The main suction base has a sturdy construction and holds firmly to my car window when it’s clean. It generally stays in place, even when I’m driving on bumpy roads, and the 360° double ball head arm offers plenty of flexibility to adjust angles exactly how I want them.

The phone holder is the part I’m least confident about. It grips my phone okay and adjusts to fit different sizes, but it feels a bit less robust than the rest of the mount. The phone holder just doesn’t seem to have quite the same build quality as the mount itself. I haven’t had any issues with it yet.

The action camera mount is solid as it doenst have any moving parts. Its strong plastic that should last,

That said, I’m not overly worried if the phone holder does break eventually because the mount uses a standard 1/4" screw thread. This makes it easy to replace the phone holder with another compatible accessory or switch to a different phone mount entirely if needed. Knowing I have that flexibility gives me some peace of mind despite my reservations about the phone holder’s durability.

In summary, the mount itself feels solid and grips well on my car window, but I do have some doubts about the phone holder’s long-term sturdiness. Fortunately, the universal screw thread means replacements or upgrades won’t be a hassle if I need them.