FREEDOM OF EXPERIMENTING
Every product development involves several designs iterations. These iterations may cost you in terms of money as well as time. 3D printing saves almost 80% of time involved in prototyping over traditional methods. This brings the opportunity to experiment more till you achieve the physical appearance you look for.
It is very important in product development to have look and feel of the object. The physical objects are far better to convey the concepts than just the drawings. Rapid prototyping allows working easy on product improvements.
Fused Filament Fabrication (FFF) 3d printing process uses real industrial plastic which provides strength and reliability. The advantage of the FFF technique over other processes is that it can be post processed like drilling, tapping and surface finishing.