Jamie S. Rich’s review published on Letterboxd :
Ruby Sparks is an uneven, yet interesting experiment. Some of it works pretty well. There are moments in the first half when Ruby Sparks is a screwball romantic comedy that it's actually quite funny. Dano is an odd comedic star. He gives a fairly physical performance, powered by his gangly limbs and Woody Allen-esque line readings. His nervous energy isn't always convincing, but neither is the script, which is actually by Ruby herself, Zoe Kazan. There are moments here where it appears that Kazan is trying to subvert the "manic pixie girl" tradition, a bit of revenge against Garden State and other films of a similar ilk.
My full review: www.dvdtalk.com/reviews/57318/ruby-sparks/