Dan really knows his stuff. I thought my knee hurt because of over-use, turns out the shoe I was running on all this time (recommended by another valley outfit) was too aggressive. Choosing the right shoe is an extremely difficult and time-consuming process. You won't know for a few weeks if you've found the right one. Dan literally looked at mine, watched me run and picked the right shoe for me right off the bat. I tried four or five other models but the one he recommended first was the right shoe. After having run four marathons in the wrong shoe and being sidelined for years, I'm ready to start adding the miles again. I can't recommend his store enough, do yourself a big favor and go!