My brother is enrolled in Lambda School, and so far is enjoying it. They do move fairly fast and the curriculum is challenging but they are learning a lot of modern architectures and skills like React and NodeJs, skills that will actually help them get a job after graduating.
I went the traditional CS major in undergrad route and most of what I learned in school was not applicable to my day to day work.
Different things work for different people, nothing wrong with options. And Lambda does have the option of paying upfront and then not having to give them any of your paycheck.