The fare class is Q - Economy.
The booking class is A - First.
So you get the advantages of a First fare: 150% EQMs, 150% RDMs, refundability and changeability (often).
UA is running these at $500 R/T to LAX, SNA, and SAN so I have bought them every time I go down to sunny...er, rainy...SoCal. It's a great deal (to me).