I always use the sliders every image is different and so is the range. I do not think there is one size fits all one it comes to photomatix and sliders.
With that said I think many of those pictures were not that great maybe perhaps because of the image quality. I don't mind cartoony, saturated , overcooked non realistic, painterly looking HDR's myself but, the image has to be executed properly to pull it off. I just don't think these were. There were a few that were not bad...