I just completed this series finally, My experience till season 5 I believe was awesome and liked it to the core. But coming towards the final one it drastically went down and was really disappointing how the way they treated Tracy, she was really such a great character and they killed it in the end Seriously!! And just to make Ted and Robin back together they ruined Barney and Robin's relationship as well when a man like Ted found the one who he has fallen that badly how can he just go back to someone like Robin?? Even we could see the change in Barney when he decided to marry Robin as well, I never saw Barney that serious over something and all that was built up to just break up over a petty reasons!! This show could be easily ended within 5-6 shows and given a good vibe instead of stretching it and ruining good characters unnecessarily. If I could rate this series till season 5 or 6 it would be 5/5, which got ruined due to unnecessary stretching and destroying the characters. Even Robin is been portrayed as a slutty characters over seasons went by.