I have the G20 and currently have AOS Sandalwood cream in rotation. It responds very well! Lathers up nicely.
I use AOS (lemon) in my G20...No issues IMO, warm on each pass
I recall my AOS lavender holding up to the heat of my DB with no issues too.
Thank you for the replies gentlemen. I may just put an order in for a G12. They really are works of art.