My 5-year old was struggling with her reading. We signed up for SST and it worked wonders. By following the program, I now have a confident, happy reader. SST doesn't just use high frequency words. It combines high interest concepts (princesses, dinosaurs - not dull like Bob books) with reading comprehension. It also personalizes each book.
I had tried everything and this was the first program that worked. It really fused a bond with me and my daughter as well - making reading something we do together. My daughter now uses her SST books to teach her little sister. As soon as she has her letter sounds down, she'll be using SST too. It's really amazing. HIghly recommend it!