I too have had custom othotics from Stanley Newell in Northgate for many years, and have difficulty if I go without my orthotics for too long.
My feet may be a little more extreme than most (totally flat-footed with ZERO arch when standing, and a leg-difference), but I have tried Superfeet and had a shoe store custom build the foam-cork-plastic ones, and they have not worked well.
Newell really seems to know his stuff, and like Catbirdseat said, he will customize and adjust them to your feet as needed. The carbon fiber orthdics have lasted much longer than any of the rest - the plastic ones will break with hard usage.
My (non-qualified) recommendation for anyone with minor issues would be to start with the Superfeet or soft orthotics to see if it helps. If more is needed, spend the dough and go see a good podiatrist.