I just have to give it five stars because, after about a month of using it, nothing about it aggravates me. While it is true that I also bought Introduction to Hindi Grammar (Usha R. Jain) alongside, the book is in no way inadequate in how it describes grammar.
There are only 18 lessons to get you from nothing to intermediate, so pacing is important. I allocate two weeks per lesson. I listen to the dialogs every day, and I read them out loud every day. If you do this, you'll start hearing the speakers in your head saying their phrases, which makes learning effortless and frustrating cramming unnecessary. Whatever didn't stick after two weeks, I fill in with a targeted effort. Alongside, I do the grammar drills from the above-mentioned textbook. All in all, I spend about an hour every day - counting that I listen to the dialogs while exercising. Your results may vary, but after a month I still "sound out" the words quite a bit (i.e. I can read the characters, but I don't recognize words at a glance yet.) So be patient. If you stick with it, you'll observe progress.
If you pay attention, you can see how the dialogs are carefully crafted to highlight certain features of the language. For example, when they introduce adjective-noun correspondence, they really make a point of using the same adjective-noun pair in both singular and plural, and to have masculine and feminine examples. So don't compare the dialogs to a Charles Dickens novel, but judge them from a pedagogical point of view. If you want high quality literature, buy that instead.
Don't forget that there are a lot of Hindi resources out there. I downloaded a publicly available math book for Indian first graders, where they talk about Shapes and Space and study relationships such as "inside", "bigger", "near", etc. A gold mine...plus the pictures are so much cuter.