One of the best additions to the Marvel universe and one of the better things I've seen this year, period. Whoever thought to implant Wanda and Vision into a 50/60s sitcom ala Bewitched and My Favourite Martian is... a genius. It's entirely believable in that context.
And seemingly an unpopular opinion - I loved the first two episodes. The whole concept fits so well into the black and white sitcom theme that I could have watched 2-3 more episodes that way. I actually found it grating when it went to colour. But of course it couldn't stay that way...
This is easily 5 star entertainment.