The concept is sound and it is much safer than nitrous, BUT it does not promise nearly the same gains. Nitrous has soo much more bang for the buck. I think this system is really designed for cars with blowers. You see, you can pump a little nitrous into a blown car just to drop the intake temp...that's idea of this system too.
as far as being much safer than nitrous please explain, install your nitrous correctly, make sure your equipment is always in good shape and you are as safe as can be with n2o
I think the main interest in this, at least for me, is because you can use this stuff and still be considered "n/a". However, nitrous would give wayyy more power than this kit ever could.