I like to use AAS with younger kiddos because I do like to drill the phonics rules with them. Level 1 and 2 are really good for learning the basics. I was finding that it wasn’t working quite as well for my older kids anymore though for whatever reason. And so I tried Spelling You See with them this year. I will say that it’s kind of hard to assess if it’s working or not because there aren’t any tests and it is mainly copy work and dictation. They do highlight vowel teams, consonant chunks, etc in the passage before writing it though.
Anyway, after testing this year, like I mentioned in my FB/Instagram post, their scores improved drastically from last year’s scores in spelling. I was quite amazed and honestly didn’t expect SYS to make that big of a difference.
I used AAS and SYS with my 3rd grader, and BJU Press with SYS for my 5th and 6th graders. They were the ones whose scores weren’t great. I will say that my girls have always been fairly good spellers, and my son has always struggled with it. So I was pleased to see that everyone did good, and the main change this year was the SYS added in.
The good thing about it is that it can work for handwriting and dictation too, so you’re kind of covering two birds with one stone so to speak. I will continue to use AAS for the younger grades to get the phonics rules down pat, but will probably add in SYS to theirs as well, can’t hurt 
It’s the joys of being a blogger kid, you get to do two spelling programs LOL!
I hope that helps some of you out there, and we will be using SYS again next year.