My friend is letting me borrow his and at this point, I'm pretty sure I'm talking him out of it or getting one of the new versions. I have last year's RX3 in the bag. I put in a quick 9 this morning and my lag putting was phenomenal. Anything inside 10 feet, I felt confident that ball was going in or burning the hole.
The self-fit lie angle is phenomenal. Super easy.
Forgiveness. If you have a imperfect stroke, the club lets you get away with it.
Weight customization. Sometime this week I'll spend a full session on the practice green getting this locked in.