Hello nmrider,
You are 5'4" and the Dealer recommended a Medium ?
I wonder what their reason was.
Beware the Dealer who tries to Sell only what is IN STOCK, rather then order another bike.
Retailers always wish to clear their inventory (understandably), but make sure the Dealer is working for YOU, and the correct fit.
{Giant has all sizes ready to go most of the time.}
My Wife has the LaFree E+1 (Small), and I have the LaFree E+1 (Medium).
My Wife is 5'3" and is very comfortable on her size small.
I am 5'9" and happy with the medium.
I think my Wife would be
Reaching quite a bit on a Medium.
So I tend to think at 5'4", you are a long way from the 5'7" where Medium starts.
My Two Cents.............. Craig