It's finally all done for myself and my wife! The past Wednesday my wife received her passport back from the Ottawa office together with the COPR. We took a weekend trip to North Dakota and came back to land at the North Portal border crossing. My wife only had to wait a minute or two before it was her turn. It was a very efficient process - the immigration officer asked her the questions on the COPR document (have you ever been convicted a crime? Ever refused entry to Canada? Do you have any dependents not listed her?), asked her if all the information on the COPR was correct, and then asked for her current address. The immigration officer gave her some information on maintaining PR status and on obtaining citizenship. The officer congratulated her and left for a few minutes to process some paperwork. After returning, she congratulated my wife again, gave my wife her copy of the COPR, and told us to drive safe on our way back home. Everything took about 10 minutes and we were on our way back home.