Lightray3d

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

In fact it's easy

when you move your mouse over the high polygon to draw a face, each time you click to define a vertex of the face you are defining ,
the vertex glues to the surface of the high polygon version in some sort.

It's like you were sliding vertexs along the surfaces of the hight poly version.

Try to find some tutorials or explainations on google

I'm not remember : Blender do retopology ?

In fact i wanted to speak not about retopology but the snap to surface function !

When you draw new faces of a new mesh you can use thisfeature so each vertex will snap in the space to the high polygon.