S1 is awesome!! So easily worth the $15 it's ridiculous...
The graphics are a little rough (could use a high powered gfx card which can do some nice anti-aliasing) but they have been improving. The South City track is especially nice - so much detail! I thought it was pretty immersive as I was racing around.
Another cool thing new in the S1 release is the drag feature.. two dedicated drag strips, one with up to 8 players, and coordinated start/finish for dragging. Lots of fun, especially with a clutch and shifter, which LFS supports perfectly, unlike MOST other racing games out there that completely SUCK at controller support! (I'm not bitter or anything... nah...)