I dont have it in the GP yet, will use that when I put everything back together. So I have no experience with it in the GP. I did run it in my last vehicle and never had any issues from using it.

The down side to Propylene Glycol is that it tends to have some volatility in the pricing and can be expensive to use up front. But it lasts way way longer so its ultimately cheaper to use over the life of the coolant.