I can't make this a typical review.
When Andrew Joslyn first followed me on Twitter, I wrote down Passenger String Quartet for the band to review, but with his name. (That's my normal procedure for when I am followed by a band member rather than by the band itself.)
The tricky thing is that so much of what is done, both by Andrew on his own and by the Passenger String Quartet, is supportive in nature, that characterization becomes pretty difficult.
Just searching for the music to listen to is its own trick. For example, on Spotify under artists there is Lerin Herzer and Andrew Joslyn together, and Passenger String Quartet. However, under Kris Orlowski you also find Joslyn and the Quartet in album titles.
Under Portfolio on his site, Joslyn does a good job of listing different projects, but there is so much to listen to, and so varied, that it defies normal review attempts.
So instead I will just provide some appreciation, and direct you to a video:
I responded most to the collaborations with Kris Orlowski, perhaps because of previously being immersed in that music for a different review:
In this case, I think "Waltz of Petunia" is a really good example of how the supporting instruments add to the song. The song could have been recorded without, but would it be as charming?
I also think there is a good argument for why exposure to classical music is important, because it provides a foundation that enriches contemporary music. As instinctive as music can be, knowing more, and having more to work with, helps.
These musicians can make your song better.