I have my payment conversion there, it is very convenient.
I got mine put in position # 4.5 (between #4 and #5)
My thought process was that it would protrude and make payments even easier, I was correct , it is indeed very easy.
HOWEVER
Because it protrudes rather than sitting in the natural hollow, I bang it and catch it A LOT.
When it expires in 3 years, I will take it out and put something else in Position 5 or 3, because by then I should have an Apex Flex in and hopefully it will also have payment.
Learn from my mistake experiment, if you go for the top of your hand, put it in a hollow.
FYI