For not much more than a cardboard, this model is comfortable with its strap and foams. The lenses are adjustable on this version (be careful to set the angle of the phone in the helmet because I feel that the edges of the lenses are relatively "soft" (less net)). The helmet fits the size of the phone but the mechanism is not very convenient (once set, need more touch :)). The foam that keeps the phone off and tears on mine because it is a little too tight.
In short, otherwise there are plenty of free apps on google play allowing to try the VR cheaply.
Personally, I rather quickly headache (I think this is due to the lag of the phone) but my kids love it.
I put 5 stars not because it lacks the magnet like a cardboard (I have not added).