It would be cool to see some top renders done with the engine in SU to really see how far it can be stretched.
I personally had trouble getting good output from it (demo), as the render lingo is different from the other render packages I use, making it more difficult to climb the learning curve.
My first impression is that a lot of tweaking is involved to get the light as you want.
(EDIT): It seems I get the render engines mixed up.
I tested the Render Plus demo and not the 'Sketchup rendering system'...
So many launches of different render plugs on the market seems to confuse me.
I mean: Turbosketch, Irender, Accurender nXt,IDX renditioner, Render Plus,Sketchup Rendering System....
Is anyone still following?....