I have only used progressive phonics for a few months, but I like it a lot. My ds6 went to pub school K last year, and was a reluctant reader. His K teacher thought he should repeat, in fact, as she felt the pressure of 1st grade would be too much for him. So that is where we were with reading - some instruction, no fluency, no confidence. We started using prog phonics during the summer and have continued into this year (now homeschooling).
He likes these readers because they are designed to be read as a team - parts of the sentence are read by mom and part by him. I print the books in black and white and then go over the colored words (his part) with a marker or highlighter. We read them together - each one for about a week at a time (well, now that we have started one with th, sh, ch we will prob go longer as it is more challenging for him). I don't do any of the worksheets that go along with the books, just the reading practice.
I also have an expensive program - scholastic phonics. I like the games, we play the bingo all the time. I haven't stuck with it the way I have with the prog. phonics, though. And prog. phonics is free! Amazing! The stories are really funny and zany.
Give it a try - if you don't like it, move on to something else. But I think it is as good as a $$$ program - just not fancy looking, in a box, color coded and full of stickers and manipulatives. And let's face it - we don't really use any of this to read, we just take a book and read LOL.
Good luck
Gem