Very surprised by the earlier opinion. I'm not at all the same vision for this product, and I think that the user does not really try because there are many samples of solo instruments (plug in and loops, not only loops).
I used these plugins very long time over a period of three weeks (the time a composition). I tried alongside other plugins, far below in quality of reproduction of instruments (strings, but also wind instruments).
What I love most: the quality of reproduction of the instruments, the variety of symphonic instruments
What I like least: I think that's unfortunately the case with all plugins symphony, it is difficult to reproduce in a very realistic game of virtuoso violinist who would play a partition very fast. Indeed, it loses natural over held notes.
Other info: I think the trumpets are a bit less well reproduced.
With experience I will ever be that choice without problem.
(If you want to hear the result of a piece "Symphony" performed with this pack and Garageband, go to Deezer and listen to the song "Rest In Peace" of Blue Paranoia.