Beware, after finishing RTK you won't be able to read any japanese at all.
RTK is not impressive to japanese people. They will tell you that "jyozu desu ne" crap and laught at you behind your back for not being able to read what you write.
But you'll feel the power of RTK while learning japanese. And you'll have the confidence boost of having dominated the 2042 kanji beforehand.
I had the experience of studying japanese without doing RTK before. Over that I'll just say today I enjoy to be able to study japanese with good input, instead of crappy textbook input.