Sightseers ★★★

I didn't feel like I was ever really invested in Tina and Chris. I don't know that "woman who is naive and subordinate" and "man who thinks he deserves more" is quite enough characterization. Chris, in particular, is a little too broad since all we really know about him is that he was made fun of as a child. The film is strongest when dealing with the trials and tribulations of their budding relationship.
This movie is beautifully shot and has great locations. I felt like most of the humor of this film came from visual gags, most notably when Tina writes a letter to Chris with a pencil she got at the Pencil Museum.
I wish more time was given to exploring the relationship between Tina and her mother as they spend more time apart, but that would be a completely different movie.