yes I think this method is very good, but then it really depends on the individual and ones memory as well.
and as javizy said, the first few hundred are relatively easy, until you have to connect a story to something which is totally unrelated, and then its bloody hard!
as for me, i try to work through about 20 a day, and then constantly revise through anki and the koohii website, looking at the different stories and making my own.
i personally try to make short stories, but then it can be easy to forget these as well.
i also make up some flash cards and put them in my pocket to have a look at when i have a spare moment.
ive also broken up the anki deck so that its in sections,
ie, the original deck is about 3000,
so i edited the deck to include only the ones i know, so i can further concrete them into my memory.
for those that only have a passing interest in this method and don't buy it,
there is a free download of the initial few hundred available,
or like me, a torrent of the whole book for download