I owna Silo 2 and just can say very very good
The universal manipulator (scale,rotate,move on one widget)
si so so so usefull i find , lot lot of time gained :
no need to select scale,rotate or move mode : all are under your widget
for UV Mapping , they 've done lot of additions since 1.4 , now it's really powerfull and make you win lot of time in UVMApping.
I'm wiating for descent videos showing how to make a normal map from a hihg
res mesh to a lower
this is the weak point : no solid videos , docs for that
The retopology to make fast a low poly version from the highter is a strong easy tool , i really like it