As a result of my previous multi-level marketing life (I know - don't ask), I tend to believe that you can make ANYTHING work
if you work it.
A lot of people have been successful with SBI! but I'm sure the number of failures easily outnumber the success stories. I'd bet the same holds true for WA. And then there are the intellects that found online success before SBI! and WA were created - these companies are probably being run by those intellects

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I'm just saying that there are enough examples that you can succeed on any platform, you just have to figure out which platform works best for you and make sure you have your "mastermind group" ready in the balances (ie dependable forum) for when you get stuck. But outside of that, if you can muster up the same amount of enthusiam and dedication - through the good and bad - for getting your website up to par as those that promote products like SBI, WA, Amway, Mary Kay or WB then I think you are well on your way.
My advice - If you can test drive them as much as you can but don't be surprised if there is too much information to absorb in 7 or 30 days. Check out the format to see if it works with how you retain information, try to find examples of other WA sites, see how much guidance they offer with building your site and also submit some questions to the forum to see if you're able to get answers that you can understand. Everything else is all on individual - not the vehicle. Besides, you have a lot of content to create, you don't want to waste too much time deciding on whether or not to use college ruled paper

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Hope this is somewhat helpful.