So what are people's thoughts on the PMI exam prep course for CAPM, and what are better/affordable alternatives

I want to get the PMP certification, and I have found that you need the CAPM cert first. One of the things I saw was a post here from last year saying that the PMI exam prep course was pretty heavily flawed. Is this truly the case, and if so, what are some better alternatives. Preferably affordable alternatives, but regardless, better alternatives?