We got everything but we started when my DD was just 5, and I didn't want there to be any handwriting pressure.
We sorta started in January, and we finished it this month. We are the lamest, most laid back type of schoolers here...meaning I didn't have it on any schedule at all. In fact, DD had 3 separate ER visits, one resulting in a hospital stay that completely threw off all schooling for pretty much 4 months--from March-June.
When we do work on it, though she often wants to do two lessons at a time. She doesn't like repetition so I offer her the choice to do the letter tiles or just write on the white board.
She LOVES AAS and we will probably zip through Level 2. She talks about spelling rules all the time. Sees them everywhere. We had a little chat about open/closed syllables while falling asleep tonight.
She turns 6 in a couple of weeks, and I have Level 3 ready to go too this year if she wants to keep going once we finish with Level 2.
We've also enjoyed their readers which is a Big Deal. DD has not liked most other early readers for a variety of reasons, but she enjoys these. They have lovely pictures and gentle story plots.