I liked it. HIMYM has never really been that much of a "laugh out loud" show for me, in the way that the two Chuck Lorre shows tend to be. (And Worst Week has never been for me - or apparently a lot of other people.) I get a lot of warm chuckles and a few big laughs a week out of it, which is more in keeping with the "feel" of the show, which is much gentler and a bit slower paced. So I liked the episode just fine. (I just found myself wishing that Marshall hailed from Hawaii or Florida and hung out in a bar where there was sand and palm trees and everyone dressed in bathing suits. )
I liked Barney's songs at the beginning but otherwise it was a pretty blah episode. I also hate the lazy "introduce a new character trait to a character the audience and every character on the show has known for years" thing.
The funniest part of the episode was Robin testing to see if they were really Canadians at 'the Hoser Hut'. Bumping into the guy and him saying sorry was both a cliche and right on the button.
I about fell out of my seat when I saw Lilly (Alyson Hannigan) sitting on the airplane with the "Wig Lady" from the Doublemeat Palace episode of Buffy. LOL
This was by far one of the finniest episodes yet. The whole interaction with Barney and Marshall about the night gown was hysterical! I also wish I knew what Robin was saying during her show, although just watching her was funny enough. I kept rewinding just to see her put that guys arm out and watch her deliver a baby! So funny!