It has 25 tutorial Lessons (using its tools: fast and concise) and 5 concept Lessons (pure junks - just fancy graphic animations).I am a sun java certified programmer, and needed to master Jbuilder IDE in a really short time for my project. So I purchased this CD, and was able to utilizing Jbuilder in a very same day.It does not teach you any new concepts. However, if you are new to Jbuilder and need to learn how to use Jbuilder in a really short time, this might be a good choice.Before you buy, download and try the 4 trial lessons from Referentia web site.