Varda, my wife and I are leaving for the Camino this weekend. I've done a lot of hiking in different countries and terrain and thought I understood the basic mechanics of footwear. You buy your size right? Fortunately when we started to train we happened to go into an REI (in Arcadia, California) and we met a footwear specialist (Michael Oliva) who impressed me as one of the rare people who really knew what he was talking about. To oversimplify, my wife has narrow feet and I have wide feet. Michael showed us how shoe manufacturers have distinct styles. Some have relatively wide lasts and some have relatively narrow lasts. He recommended that we match our feet to the manufacturer. Then you fine tune the shoe to your size including possible adjustments by stretching here and there (they have a machine) and the volume of the insoles. Originally I thought we should both get the lightest trail runner type shoe and buy the highest volume or most cushiony insole. We bought Merrell Moab Ventilators with Sole Ed high volume insoles. My wife's were OK but after a hundred miles or so the fit on my Merrells changed and started causing me problems. (One of the very experienced members here who seems to live near the Camino posted that the brand she sees abandoned most frequently on the Camino are Merrells. Of course, who knows why that is. Maybe people tend to buy the cheapest models.) But again, to be as brief, I ended up with Salomon Quest 4D GTX with low volume insoles and my wife is using La Sportiva FC ECO with medium volume insoles and so far we are very satisfied. But that's only based on a couple of hundred miles. Wishing you the best.