I use the 360 and don’t find it uncomfortable or limiting, I barely even notice its on when driving. I prefer it over a foam collar. The foam collars are usually too tall and bulky for me and make it hard to turn my head or have any movement.. but they obviously aren’t strong enough to hold your head in a good position in a violent crash.
The only thing I don’t like about the 360 is the locking mechanism. It likes to spin around and you kind of have to stuck your thumb it in to hold it still to unlock or lock it. Very minor annoyance. Can’t beat the price vs the Leatt.