Setting aside the issue of financial burden, I'd like to point out that Kaplan is extremely useful assuming you are one of the people who can benefit the most from it; what I mean by it is that if your medical school did (or is actively doing) a poor job of providing you with the foundation from which you're supposed to be deriving your CK-specific-knowledge (which is, ideally, only a fragment of what you've been taught in school) - Kaplan will be happy to "fill the void". The reason I'm saying this is because I didn't really manage to figure out what student category you're in and what you're hoping to get from Kaplan. If you're only looking for a way to review that which you already have a grasp on - staying away from Kaplan due to time restrictions probably makes sense and simply going through UW with perhaps MTB is (probably) the most popular way of doing things.
With that being said, if you're in a different category - the one in which you feel like you need to start from scratch (more or less), there are no alternatives to Kaplan in terms of comprehensive review. Watching all the videos (a few times most likely) and going through UW (a few times, most likely...) is very unlikely to leave you unprepared for the exam.
Just to clarify, I never tried the Kaplan QBank and I didn't use the lecture notes for most subjects, which means that every time I used the name "Kaplan" I was referring only to the videos; I also never used any of the other review courses you've mentioned. I'd also like to point out that, as you probably know, UW is no walk in the park, especially if you're planning on deriving the most from it - some would argue that using UW as your only source is indeed all that's required, assuming you make the most of it. (whatever that means, right?)