Last episode of what if touched my heart. Till 8th episode it will just tell you all possibility in other universe in which you may get boared but when you come to the last episode, you see that all storyline are coneecting which fabulous. According to me it was one of the best marvel series. The cons about this series is you need patience. Till the end you may think to stop the series but at end it's worth it.
Another thing is, sometime you may feel it is senseless and yess it is senseless somewhere (like what will we do about watching the story about some another universe and at some moment you will think how can be this even possible), but if you are just watching it for entertainment and not judging the series about it's story then it is damn good dtory