This is my 3rd flight flying JB...
My first trip was a roundtrip from SD to BOS - Nonstop. It was great...
Second flight was from LAS to Long Beach. The flight was less than 45 mins, smooth, and seamless. Snack and drinks were provided for the short flight and the staff is friendly.
Free check-in for 1 bag which is a bonus because I always check my bags, even for short flights.
Assigned seats and seats are more spacious than SW.
If JB has more inexpensive flights out of SD to the places I travel to, I'd def fly with them more.