I tried it with my 5D and found my own profile created in C1pro to my needs better for my purpose.
I wasn't recommending the 5D profile, but the Phase profiles.
There is something really strange going on with the 5D, I have made several and they don't have much success. I have the impression that camera to camera variation is strong and that indeed users would be better served by custom profiles or edited profiles they create themselves.
The Phase profiles seem to work decently, and my old Leica profiles also made people happy.
Frankly, I'm happy when my profiles make people happy, and as they are tipware nobody can claim that I cheated them.