I have used Porter paint only because it was left over from our home when it was built. Actually only used White gloss for some trim and I felt it was comparable to SW as that is what I normally am use to. Not much of a comparison but something. I have been wanting to pick some up try on a real job and probably will soon for our personal use to see how it is.
It seems like the builders choice around here.
I will never leave you hanging! Web One Man Shops