Well, it has the usual problems of fractal height fields. The fractal dimension is too consistent, the continents aren't the fairly solid lumps they are on Earth, and the mountains are all huge, centred on the land masses, and with smooth gradients to the coasts. Real mountains tend to be along the edges of continents, and are far more complex, often with multiple, parallel chains. The bathymetry isn't remotely realistic, there are no ridges or trenches. If those odd circular structures are meant to be volcanoes, they seem to be bigger than Olympus Mons.