I have used Logic of English from the beginning so I don't have much experience outside of it, so I'll try to be as fair as I can be in my answers to you. We are also about to start D.
A is pure phonics of the alphabet and NOT in order, which I loved a lot. Like the phonogram 'd' was one of the first letters introduced, and 'b' was introduced towards the end, completely keeping the ever common 'b' 'd' swap up at bay, at least for her. The teaching of the writing strokes is amazing, but after it starts getting towards dictation (towards the end of B), my daughter hated it and I have changed up the writing a bit.
B is the start of blends and digraphs with silent e. It starts focusing on sentence structure at the very basic core (capital letter at the beginning, punctuation, raise your voice for a sentence that ends in a question). Like A, there are a mess ton of games and you really don't need much beyond the flash cards. Sometimes it's hopscotch to the right sound, hide-and-search for the correct sound in the room, flyswatter the correct sounds, bingo, tic-tac-toe sort of games. They also have cards in a smaller size for card games like "Fox" and "Memory". We liked the cards for drill, but my daughter is much more active than a still child so the hide-and-search games were favorites.
Also the readers they use with that program are the BOB books if that makes any influence on your decision.
I elected not to do cursive first for her. I felt it was easier to build up hand strength with simple strokes you could stop in the middle with ease if needed. Cursive is a little more difficult to pick up in the middle of letter formation. Plus, I almost always write in cursive so while she doesn't write it, she reads my shopping lists to me at the store which are written in cursive. I plan on teaching cursive later when she can write a couple sentences with ease with the rules she does know about spacing, punctuation, indention, etc. But she's started asking so I may teach her sooner. So I don't really have a dog in this fight, but it's the reason I went with manuscript first. Hope this helps.