Just moved to SF from Canada and I've spent the past month and a half struggling to get my finances setup. I don't have a credit history and my Canadian bank doesn't provide a decent cross border account so I have to start completely from scratch. Even though I make a decent salary I've been rejected by Simple, Chime, Final, Capital One, and Chase, all because I don't have an American credit score. If this service works as advertised it will be one of the most useful and timely services I will have used in my life.
Full disclosure: I work at Petal, and I work here because I think this is an awesome product, especially for people new to credit, recent immigrants, and first time credit card owners.