Poorly thought out - just a hodgepodge of random information in no intelligible order. If you know your CSS you probably don't want to use this as a reference and if you don't know CSS this ain't gonna get you off the ground.
Unintelligible and clunky You go into minimal detail. You don't explain what each rule's parameters do or are for. The app's font and styling is very inconsistent, which is sad for a CSS3 tutorial. This is absolute garbage and I'll not be downloading again.
Not lying Truly useful app, good job. 1 suggestion it would be better if we had some sample good looking websites available to have idea to implement CSS More precisely. That would 10 on 10
Ok It is ok
Good job I like it so much.