As a Canadian I did not have interest ina Canadian Steakhouse. The decor looked miserable, and I felt my meal could be spent better elsewhere. However in January we chose the DlxDP so we decided to try our Disney's version of Canada! We were able to book our 180ADR for lunch only, no dinner available. I had read the hype on the DIS and the tour books as well as the TA. BUT I went in with an open mind. I like steak, I do not love it nor am I a food critic by trade!
Our lunch was our best meal! I did not expect this! I did not like the cheddar soup, but I ate it and gave it a chance. I did love the pretzel bread, be it known I have never eaten a soft pretzel before (until this past Disney trip- it was one of my missions). I did love the chocolate raspberry milkshake. And the mushroom filet was the best meal on our trip.
We did not try any signature dining, we tried many TS meals at each theme park and various resorts. This meal turned me into a steak lover. I have been to a variety of Canadian steakhouses since our return, and no luck charbroiled nastiness is what I get.
In regards to decor, I was pleasantly surprised that I did not feel more dungeoness, I actually found the seating capacity much smaller than expected. The tables were too close together, and the family next to us were amazed at how our CM took to us - maybe because we were Canadian.

Mind you that family didn't even talk to each other let alone the CM. We were very social with all the CM and I could tell we brought a piece of home for them as we had "familair" talk about their hometowns landmarks.
Overall we would go back. We enjoyed it!
I went in expecting not to enjoy it and was pleasantly surprised! Would I hype about it? No, but I would recommend it for a nice sit down meal.