Discriminating musicians and music lovers from around the globe recognize this St. Paul boutique as a must-stop six-string Mecca.. In Short If your passion for guitar begins and ends with an Esteban infomercial, keep out. The carefully cultivated stock and super-knowledgeable staff at Willies cater to folks with a deeper appreciation for music and the tools for making it. Guitar heroes from Bruce Springsteen to John Mayer have been spotted here, edifying the store's rep as a world-class haven for cool, classic and collectible axes. Meanwhile, upstart rockers and wannabe folkies can find quality instruments and accessories, plus a roster of private instructors for every style and experience level.