We did LfC A last year, I bought the entire set and my ds (who was in grade 4) was miserable. He liked it but he retained nothing and he was also playing the online games too.
This year, I went back to Lively Latin (something I bought years ago) and it has been a hit. He has remembered so much and is having fun with it. He said the way it is presented makes more sense to him than how LfC was presented.