This product was a fun little add-on when it came to a bigger purchase. Both my girlfriend and I wanted to see what the heating sensation of lube could be like. From this, it was very immediate, being able to feel the warming sensation on the guy's end. As for my girlfriend, it seemed reasonably underwhelming. The lube is a high-quality, was really slippery and smooth, but this warming sensation did not last a very long time.
I would be intrigued to see what consistent use of this warming lube would be like and how it would spice things up!