I feel like the odd one out here as so many people just love Time4Learning, but I did not, nor did either of my children. Even my 8 year old, whom I consider very bright, had a hard time figuring out how to do everything and where to go. I had hoped they could use this on days where I was busy with my business or sick, etc. but they needed my help so much it didn't help me at all in the way I was hoping.
I wasn't happy that each lesson didn't "disappear" after they finished it either. They could log back in later and then have to figure out where they had left off but if they made a mistake, they'd go through the same lesson all over again. Maybe they (and I) were doing it wrong though, so not sure.
I'm glad we tried it, but it just didn't work for us. I also think, as a core curriculum, they were really missing out on my one-on-one attention.
Hope it helps,