I have to admit, though, I have not had time to explore it but I am hearing fabulous things about it.
On a personal note, one of my Kindergartener children (I have twins), brings home an A-Z book every night and her teacher has activities that she does with it. Let me clarify, she brings home the same book for a week. Each week, the book changes.
The activities are simple and require her to reread the book, look back in the book, reinforces sight words, respond to the book. It is truly age appropriate and I cannot believe how much growth she has made since September. She has moved from Pre-A to now, B.
Signed, Proud Mama
And as a side note - As a first grade teacher and a mommy, I am in awe every day with how my own 2 children are learning how to read in such different ways! It is truly an amazing thing that sends chills up my arm and brings tears to my eyes. To see that excitement when they find a sight word in a book we are reading, on a sign as we are driving, in a menu at a restaurant - it is just fantastic.