Anyone using? Any good review or just another marketing preach?

 

It works! I use it in my YZ 450F. However, it doesn't have a thermostat. If your car doesn't overheat, you dont need it. The thermostat opens at a predetermined temp no matter what type of coolant you have.

Edit: Now, if you had an open block race motor or something (no thermostat) it could help. Plus, you don't mix it so you would have about $60-$80 wrapped up in a coolant change