The village of Luss is most definately somewhere that you should visit when in the Loch Lomond area.
It has a quaint old world charm, and is located literally on the West bank of Loch Lomond.
We were lucky because a friend from the area told us about the place before we planned our trip
Because the road by-passes the village, if you weren't aware of it you'd shoot by without realising what you'd just passed.
I can't speak about the other restaurants there, but on a drab rainy day (as it often is) we stopped in at the Coach House Coffee and Tea shop and left very impressed. Excellent atmosphere and top notch food at a reasonable price.