I never understand why Valentina is not more widely adopted and used. It is a solid, reliable, and *extremely* fast database engine, which plugs into just about every development and deployment environment. It supports a *huge* range of programming languages and environments, ranging from RealBasic and Revolution, through PHP and Ruby, to Cocoa and C++. The developer is friendly, responsive, honest, and extremely knowledgeable.
The only suggestion I could possible make, is that if pricing were slightly lower, perhaps it would be easier for hobbyists and web-developers (who usually rely heavily on open source and freeware) to confidently adopt Valentina.