Let me first say that Symphobia is probably not the best choice for a first/only symphonic library. This is due to its heavy focus on ensembles.
However, this is also its largest strength.
With Symphobia, I'm able to rapidly orchestrate basic ideas which I then fully flesh out by adding instruments from more granular libraries (e.g. East West/Quantum Leap Symphonic Orchestra or VSL).
Make no mistake, Symphobia creates amazing depth with its ensemble recordings. I am truly taken aback by feeling I get when listening to piece made with this library.
I considered docking half of a star due to the extremely high price. However, it has completely met my expectations and definitely surprised me on more than one occasion.
I would say that if you're considering Symphobia and you have the money to spend, don't hesitate! I'm glad that I didn't.