For the money it has, it is very good. I put it on a scooter and traveled all over Greece (3000+ km). It didn't feel anything, neither on dirt nor on air nor anywhere. It only broke after a bad fall and now I am ordering a second one without second thought because I am so satisfied. Build quality complete. It is 100% worth it for delivery and basic trips. If you want aerodynamic mounts, these are the ones, with 5 euros it covers 99% of people who just want to put a mobile phone with GPS.

Edit: Not suitable for single-cylinder motorcycles. The vibrations caused fatigue and broke it twice. For scooters in the city, it is still excellent and discreet

What the friend below says about the threading is true. It is very short and therefore useless. Rubbish.

Very good choice, you can put whatever you want afterwards.
I broke the flexible one in 10 minutes, and my bar gave me many solutions