Its very interesting to have a advanced modern database and no server that needs to be running, but at the same time its possible. The interface for accessing data is completely new. With the huge amount of documentation available it has a great learning curve and makes extreme sense.
The best thing on this technology is that you are free to use it without fees in GPL projects. DBMS, OSI/Java/C++ IDE, GUI Designer, Terminology editor and a framework that allows rapid development for C++ applications.