Quite nice, albeit (uniformly) noisy because of glass roughness.
But the funny thing is that the grapes produce colored caustics / reflection
The glossy material shouldn't have a RGB texture on spec channel and the glass shouldn't be colored.
EDIT: Actually you can use colored glass, but it shouldn't be too saturated. The grapes will produce colored caustics - visible under strong light.
But you should use a grayscale texture for glossy spec channel - colored reflections are a property of metals.