House Republicans have introduced an Obamacare replacement plan after years of promising they would come up with one.

But while it’s backed by House Speaker Paul Ryan and leaders on the major committees with jurisdiction, the plan leaves out a number of key details and doesn’t say how much it would cost or save. Ryan, who will discuss the plan at the American Enterprise Institute Wednesday, has stressed that it’s merely a blueprint to show Americans how Republicans would reform healthcare should they get a chance next year.