I've always been into detailing, started just doing my dads car when I was around 14. Back when I learned about Griots Garage products, they were a much smaller company but always made decent products that come with a lifetime warranty. Now, all these years later, I really don't use their waxes/sealants because once I apply opticoat 2.0 from optimum polymer technologies, there isn't much else needed except weekly washings. But for interior car care, I still do like their products.
How I actually learned about them, wow, I just don't remember. They have been making a 'handbook' with their products since I've been using their stuff and I think I mailed away for one all that time ago, made an order, and since have always gotten their handbooks. I'll admit, sure you can find cheaper products from places like chemical guys but I'm happy with their products as well as their customer service so for interior stuff like leather cleaner, interior cleaner, speed shine, they keep my business.