It was a pretty decent episode. Like others, I do think the show is starting to wear out it's welcome. But if they do get to the mother this season and have next season be about Ted getting to know (and eventually marrying) the mother, then I'll forgive it.
I'd love to see a How I Met Your Father, with her telling the story to the kids. And Barney is a regular, because he banged all her friends and collegues.