I use it and generally am happy.
Sometimes I forget the steps to post new work if it has been a while but I am rather a ninny when it comes to computers so that may be the problem .
I have, I think, had ONE sale in 11 years online and have pretty much neglected that portion of Zenfolio.
Instead, I sell work in a few galleries within about a 200 mile radius of here. Works much better, for me anyway.