I've just started with my DD (age 7) and it seems a good approach with lots of individual back up. It's expensive (although they offer your money back if you're not satisfied) but they also say it will take about 4 months to see any improvement as the program is designed to change the way in which the brain processes reading. So it's the time investment I'm concerned about as well as the oney I'm interested in how they deal with things as they get more complex, and I'd love to hear from anyone who has done it.
here's their website