I finished the book a week ago and I'm now on the rtk3(skipping the rtk2). It took me about 100 days as I was learning 22 kanji a day(some days I'd do a few more or less) and I found it was a great method and now that've I've started learning vocabulary and what not I find remembering the kanji to go with them extremely easy!
The only things I don't like about this book is that I found the stroke order was omitted for most kanji and I had to look up a lot of them. The book says they should be obvious but I didn't find (some of) them obvious at all. Plus I found out a few of them have the wrong stroke order in the book but that being said the book DID teach me the stroke order of the kanji and I don't have any problem remembering now. There was also a few type o's in the book; wrong kanji, wrong primitives listed, etc but they are pretty easy to pick out.
All and all I'd say this is the best way to learn kanji. I was very happy to find this and I feel so confident with my Japanese studies now. If anyone is interested, I'm using a study plan I found on nihongoshark.com. Their ebook explains it and I'm really happy with it so far :)