We start with Hooked on Phonics K, 1, and 2. Then, we transition to Master Readers. While in each grade level they are also using: ETC. K level would be ABC and so on. I also begin AAS to just keep reinforcing our rules and spelling. By 4th grade, my son was using SWR. It finally 'clicked' ;) and just seemed so much easier for him after acquiring more knowledge and basic understanding of sounds and rules.
So, a K level reading program in our house is: HOP K (yellow) level, ETC A,B,C,1; Grade 1: HOP 1st (orange/red) level, ETC: 2,3 AND some AAS; Grade 2: HOP 2nd (green/blue) level, ETC: 3,4,5, etc... AAS; Grade 3: HOP Master REaders, ETC: 6, and up, intro from AAS to SWR.
I have found that all of these work very well together. It keeps the boys from being bored with too much daily routine b/c they are moving from one method to the next. It just works well for our family!
HTH!