I tried square foot gardening for the first time last year and it was a huge success. I had more vegetables in two 4x4 gardens than I ever had when row gardening. I am putting in at least two more this year.
I have had an herb garden for several years in one of those big 4' patio pots and it works wonders!
I had been told about SFG for years and finally bought his updated book a few months ago. Living in the desert some of his ideas won't work but as I read his book I found I was already doing many of the things he teaches in his book. It is a good book and uses sound ideas. I don't use a grid system permanently in my garden. I lay it all out and plant but don't have his fancy white squares. . .
Also being in a desert, I don't have his individual raised beds. They would dry out WAY too fast. My whole garden spot is raised but I then plant in the native soil and lots of compost. I do have more weeds. . . but not too bad.
Here is a photo of my back yard take in 1993. Notice the Blue Spruce and arborvitae in back of my family, the lawn and broken concrete patio and the old pear tree. This was the first stage of the redo. Compare it to last autumn's photo. Each plant has a story. We have had weddings, funerals, showers, family and neighbors gather for shared events. I mostly sit and remember, now. A nice way to live the last stage of my life.