FDM printers can be extremely limiting. Due to the fact they need scaffolding/support to print anything with overhanging features. SLS prototypes allow for complete freedom in part shape.

I find I design within the constraints of the printer which is not ideal when the final component production method might be an injection moulding.

But having a 3d printer on the desk next to you _is_ invaluable and can help solve issues in a matter of hours rather than days or weeks.