In-and-Out is the standard of quality by which other burger joints are measured.
Out east, Five Guys and Shake Shack can give In-And-Out a run for its money. Schnipper's Quality Kitchen is only one location now that I know of, but I suspect it's going the Shake Shack route.
The thing is, there are maybe as many Five Guys as there are In-And-Outs, but there are only a handful of Shake Shacks.
If Shake Shack had as many locations as In-And-Out (over 250 as I recall) and maintained the current quality, they would be hands down the better operation.