Roxanna, I'm shopping it. I've done so for a few years now. I will be judicious because the costs are so much higher now with the CAD so low.
What I often do is order things to be sent to a US address. I live 45 minutes from the border. I drive down there, try stuff on in the bathroom, and immediately package up and return what i know I do not want. This saves on delivery and duties.
If a family member is going to the US I will ask them to bring back my loot. (I was lucky enough to do this last year).
Once I went to Michigan and shopped with Sveta. We made a trip of it because I had to be in Toronto for work so visited her in London just before that, and we headed down to NAS together. Fun times!!
I get good deals on underwear, statement items I could not find here, and footwear. For me, it is worth it because shopping is so terrible where I live. It might be different if I lived in Toronto.