It really is hard to tell if you need a Women Specific design or not. I am 5'4" and have never had a wsd, and am perfectly happy with the bike that I have. I do not have a short waist so all my men's frames have worked for me. Sometimes, you have to work with them, i.e. swapping out stem heighths and lengths and types of handlebars, reach on brakes, and length of cranks, but I have always been happy once I have them dialed in.