My bike is a flatbar roadbike from Specialized with Sora components. It has the EZ Fire shifters. They work great. I had them adjusted once when I first got the bike and had a little difficulty with shifting in one gear. I have since just passed 1000 miles on my odometer (yeah!!!!) and have never had a problem shifting.

I think WSD bikes must have a larger measurement than men's because mine is 51cm and I am 5'3" and it fit perfectly as soon as I got on it. Perhaps you would fit on a 54cm in a women's and something else in a men's style.