Perfect final scene
Although season 9 was the worst of the show in general, mainly due to stretching a wedding weekend to 22 episodes while squeezing in the last two episodes many important stuff (and making kind of pointless most of that we saw before in the season), the last scene was perfect to me.
Everyone dislikes the ending but someone had to say it. Yes the final episodes could have been handled better and not feel so rushed, but Ted under Robin's window again after so many years from season 1 was very emotional and made the relationship come full circle. Tracy was fine but we didn't know her so we didn't care much. Ted and Robin's relationship through the years was the main focus of the story and even his kids told him that in the end.
Plus, i was always dissapointed that from the first or second episode he called her aunt Robin and we knew right from the start that she wasn't the mother, so i loved the twist that they supposedly end up together.
***All those moments will be lost in time, like tears in rain.***