I got my B1/B2 visa from Canada and I am a permenant resident of Canada. I tried to enter USA from Windsor by the bridge. The officer is an indian guy and he refused my entry. That thug is so rude and let me wait for 100 minutes before sending me back. I planed to try to go to USA with my bank statement next time. The reason I got denied is I still do not have a job yet after 3 months in Canada.
Right now it is very hard to find a job in Canada from my own personal experience. They just do not hire you no matter how qualified you are. For those people want to come to Canada and go back to USA, I suggest you do not use the bridge.