Dear Eduardo,
I own two of them (Gemini 500) and love them.
Simple, well built, affordable. Best bang for the buck it think.
And if you want to use them on location get a Innovatronix Explorer battery.
Don´t get the Digital DX version, but the rocksolid Gemini 500.
My personal favourite would be the Gemini with the simple Profoto connection for light shaping tools.