It would be nice to have smaller packaging (at a lower price point) since you dilute the PG with water and a gallon of 100% PG will give you many fills if you use a Brewbuilt Icemaster 2 glycol chiller and a Brewbuilt X2 jacket conical (I have a 14 gal model). That said the quality of the glycol appears excellent and provides the ability to chill the glycol/water mix to a low temp for cold-crashing at the end of fermentation.

The glycol works perfectly in my IceMaster 100 glycol chiller. I'm able to chill to -2C without freezing or circulation problems. There were problems shipping the bottles though leading to multiple reshipments of the product until it finally arrived intact. I don't know why. Even when they (2 gallons) arrived one had leaked a small amount (2-4 ounces) but not enough to be a problem.