I agree that for everyday use, its not worth it. I use it for everyday use, but i get it for free. Where it is well worth it is on the track like i mentioned earlier. I sit there with my Nitrogen filled tires and never have to adjust my pressure. I watch everytone else constantly adjusting their pressures after each session. I remember a track day in my Audi. After one hard session my tires had increased 12psi. Thats huge. That kind of pressure change will cause major problems with traction on the track. If i had been running Nitrogen, it wouldnt have happened. This is my real world experience with Nitrogen vs. Air.