Another vote for quadlock. Have used them over two phones and 10s of thousands of km (that's about 4.5mile), including many thousand dirt km - both dirt touring and i have 10km of dirt to get into my place.
Only (non-self inflicted) issue I've ever had was the first case I had on the first phone started wearing a little and eventually broke one of the lugs. I fixed this by putting a small disc of thin foam padding at the centre of the mount. This was before the antivibration mounts came out and it hasn't been an issue since I have had one.
Only (non-self inflicted) issue I've ever had was the first case I had on the first phone started wearing a little and eventually broke one of the lugs. I fixed this by putting a small disc of thin foam padding at the centre of the mount. This was before the antivibration mounts came out and it hasn't been an issue since I have had one.