The article is about the product/service that I am creating (I expect USEFUL criticism and suggestions) and about sharing that lovely HotDog story ;)
I am skilled enough and I know the subject enough (not everything) to create what I promised. And I am skilled enough to learn what I don't know yet; after all, "HTML/CSS is stupid simple", like people that criticizes me always say.
EM/REM is a thing that I tried once and did not work with. In fact, it is more simple than I remembered, and it now is a core part of WebAsYouWish (not EM, just REM). But it is a small INNER detail.
I think that the true QUESTION is "Can I deliver what I promised?". Time will tell.
And the second big question is "In case it works, is it useful to you?". I am glad if it helps. Otherwise... forget about it.