Heheh, that's pretty cool. Never thought I'd be getting rick-rolled from chamber music but hey. :p
The first section of that ^ song was rather very well done in its arrangement to strings; I especially loved the bass' movement, it was quite catchy. The middle part of the song file started getting a bit clustered, but there were still some cool things going on. By the near ending it felt too busy for me, and I think it has to do with the pacing of the whole song. I think one things that can be done with this song is to have some "break" sections - it'll give some contrast to the faster/more clustered parts and give the listener a break to appreciate it more.
But aye, definitely some interesting things going on in there.
Keep it up!