Good for all styles and levels except expert.
Price: $29.95 (new)
Where Obtained: Black Belt Guitar Academy
Suitable for all skill levels of guitarists
I tried all four demo systems, and ended up paying for the Scale Trainer and Speed Trainer. I did the exercises, and guess what... they worked.
I liked best the fact that before starting any exercise, the software assessed exactly where I was in many areas of playing, and then I spent the most time doing the exercises that I really needed. No wasted time on stuff that was too easy. I could also measure my improvement exactly.
You can see in the demo versions what you get and what you don't get. Once the license was obtained, the products worked as advertised.