Dont forget to set your subdivs high on that refraction glossiness (30 or more). Render times will be a beast but the results are worth it.
π
the subdivs setting will control how smooth the frosted glass looks, the higher the number the smoother it looks (but at significant cost in render times)
The only thing that looks off is the unsoftened car body in the last pic... is that the model, or the renderer? The building looks fantastic anyway, better than anything I can make π