Interesting, I've found myself entering and reviewing sentences into the work-in-progress area without using any answers, I only entered a translation for those grammatical constructs I had more difficult to understand. Even when I entered a grammatical explanation, I found it not so helpful during review, because my mind was not in "studying" mode while reviewing.
There is a "notes" area which can serve as the "answer" part from traditional flashcard programs but I'm coming at it from a different perspective. Ultimately I think it's possible to review without entering any notes at all. If you reviewed properly, but you don't remember the meaning of the sentence (vocabulary aside), I'd say you need to look it up again.
I'm saying this because it seems like it would take forever to enter even just a thousand sentences in the way AJATT recommends, while adding so much details.
I think what I'm working on is more akin to the AJATT method than traditional flashcards. The interface is designed to make it easy and fast to enter sentences.
Regarding the pronunciation, it comes directly with the vocabulary attached to the sentence, which itself comes from the dictionary. I like the fact that you have to move your eyes from the vocab to the sentence, there is no furigana in the sentence, neither a full pronunciation under the sentence. I';ve found myself sometimes forgetting the reading in just the split second it takes to move my eyes from the vocab word and it's reading, to the sentence further up the page. I think that's a good indication I need to pay more attention.
Review tests :
Writing : it seems most people consider writing as secondary, and I would reckon that if you read something often enough you can remember the writing with the help of the keywords, since the keywords combos are like mnemonics in themselves. So I currently have random writing reviews without flashcard status, but the selection could be made based on recently added material, or any range of dates for example, or even only those words that appeared in the sentences, etc.