Yeah - S3s rule! Had mine since new in 2007. Almost 17000 miles and very few problems (although it does tend to lose a bit of coolant from time to time!).
I reckon these are better than the S4s in many ways...
There's not a lot in the manual anyway, but we're all happy to help and there's plenty of experience of owning these on these hallowed pages.
Don't worry if the air-con sometimes fills the car with water vapour after turning off - it seems a standard feature and will clear again after a few minutes of fog.
Have fun! (age 54 but only 46 when I got the car!!)