It is slow, you'll need more exposure than most papers need. It works best with warm tone developers. Kodak Selectol and Selectol-Soft were both warm developers that were GORGEOUS with Ektalure, but they're sadly long discontinued. Don't worry about wasting it, you'll simply have to waste some in order to learn its properties. It was a grade 3 paper, so for normal negs the lower contrast selectol-soft developer was best.
Great comments - let me add that untreated Ektalure tended to display a greenish tonality, but it responded very nicely to selenium toning to yield a beautify brownish-gray/black.