Manga rock is a great purchase. Officially the best manga reader that I have ever seen. It is 100% unlimited downloads of manga & once you buy the full app, It costs 99 cents (at least it did when I bought it), you can have all the manga downloads you want for free, & it has something close to 1000 different manga. The app itself is with little to no problems. The most predominant problem however is that it will crash from time to time, however this is nothing more then a minor inconvinance & can be easily solved by restarting the app or hitting the reset button in the info tab. I had one freak thing happen to my download of manga rock, where, for some reason it wouldent let me download or even read any manga what so ever. I'm not sure why it did that, but I'm sure it's just a fluke.
I would recomend this app to anyone, otaku or otherwise it is a great app!