I have only heard of that brand from the automotive youtubers I follow but they are also sponsored by it. Its not a common brand used on these forums or even on some facebook groups AFAIK.
Yep, use the CSS on top as a QD. I haven't used it as a drying aid. The 3 n 1 topped with CSS is a great combo that I use on friends & family vehicles.
One we use in the autobody industry. "You burn while you learn". (Same saying can be used for novice man pedal drivers or "You cant find em, grind em").
SONAX Leather Foam Leather Cleaner & Conditioner. Been using it for years on all my leather interiors. Even after using it on the newer car, hasn't covered up the new car scent.