From The SpiritWiki
Connection Quality refers to the positive or negative quality of a connection event. A positive event (a.k.a. a Zenith Experience) is one that is calming, uplifting, and enlightening. A negative event (a.k.a. a Nadir Experience) is an event with overtones of fear, angst, terror, and confusion.
Connection Axes > Connection Content, Connection Duration, Connection Intensity, Connection Outcome, Connection Quality
A connection event may have both positive (zenith) and negative (nadir) aspects.