As some may know i have been experimenting alot with 3dsign. Here are a few things i have come up with so far. Sorry im at work so no pics. Or screenshots.
Get your favorite textures load em up into PB. And using the texture try making some of this stuff.

Stone park bench with wooden back. (Will need 2 signs) Just need to add seat 1.
Brick face park stool. This is just a plain cube with seat1 but brick faced.
Retaining wall for plant bed.
Get a tile texture and make nice pool walls.
Need to cover flooring in a hurry? works just as well. Just add your texture.
Works really good if your doing walls in new layout and want same texture on other side. Why make 2 signs right?
You will need to play with the resolutions to get the right design sizing is key as well but you get the hang of it pretty quick.
The beauty of 3d_sign is its 6 sided abilities. The right textures will help with voids and can even eliminate using doubles.
Give i a try sometime.