Anyone use ES-12a instead of R134?

[coop34]

This stuff claims to be more efficient than both R-134 and R-12, with some other benefits as well. It also appears to be an easier conversion from R-12. Has anyone tried this stuff?

Here's a link....

http://autorefrigerants.com/Envirotechnical.htm

[trucks72]

I have not used that before. But I have used Freeze 12 before. Did a good job. But I was told by a air condition man one time. If there was a better product out there, the auto manufacturers would use it.