Solidworks Boundary Surface

Does anyone have any pros or cons for using a boundary surface versus a loft or a fill?

What are the main differences?

All I can find is that with a boundary surface you have control over the tangency of all sides, as oppsed to a loft in which you only have control over two, which then makes me ask what the value of the loft is when there is a the boundary surface available.

Any thoughts?