I vote with 'Larry, Moe, and Curley' The three previous posters. As a long term SoCal resident prior to retirement I had a lot of Double-Doubles in front of me over the years. As a person who dealt with hundreds of 18 year olds in our community every year (teacher) I learned a lot about the Fast Food outlets in our area and the goods and bads of working at any one in particular.
In and Out was ALWAYS well spoken of by the kids who worked there. When an opening was available there was a lot of interaction between kids looking for support to get the job. Reason Being--In and Out paid a buck more an hour to start...gave benefits like sick leave and vacation days, before it seemed to be a public issue, had a health-care plan for those who chose to participate.
On the other hand, The crew that had a piece of the action in profit-sharing bonus's tended to police themselves as far as 'give-aways to friends' and slow workers. There was a real...if we work together we'll make more money' attitude. Considering what we read in many FF job stories, this attitude is refreshing!
The Burgers are fresh and quite good. When compared to exotic large restaurant style Burgers they may not compare well...but they beat hell out of any FF chain I have visited.
Like Engine Capt. above. If I am going to sit down to a (semi) FF lunch, FARMER BOYS would be my first choice. If I am hit-and-run, then the Drive-Thru at In'n'Out is where I would go. They will ask in the drive-thru order if you are taking them home (double-bagged) or eating them in your car (Open Boxed). A small item, but that little extra makes the difference to some folks.