I picked up three of the Agitato libraries this evening (violins, violas and cello ensembles). I've only just started using them, but already I really like the results I'm getting. Very expressive; a great set of accessory patches to my other string libraries. At $44 each, I think they are a huge steal.
In particular, they mesh stunningly well with Sonokinetic's Da Capo -- to my ears, anyway -- and that is kind of a big deal. Da Capo has a legato articulation for its string patches, but I don't find it particularly special or expressive, and anyway the range of the Da Capo strings stops about an octave short on the high end, which I find a bit irritating. While there is a lot about Da Capo that I genuinely like, I do find that the lacklustre legato and smaller note range does limit how much I use it.
However, the Agitato Ensemble Violins work really, -really- well with the Da Capo sustain strings patch. They both have a very similar timbre and style, it seems. I can see them as a great one-two combination, especially for romantic/melodramatic/over-the-top string arrangements (for which I have an admitted soft spot). Pretty cool.
Up to now, I wasn't really thinking of grabbing the Sordino library (of any of the Adagio libraries), but now I'm seriously reconsidering that...