another Incra question

I bought this rig at a yard sale for $3.00. Being an Incra item I know it cost quite a bit more than that new. But that is about all I know.
It is obviously an adjustable fence deal.
But, I don't know what use it might have, at least for me. The fence on my table saw seems adequate and this board would take up quite a bit of room. Also, I'm not sure how I would get this thing perzactly parallel to my blade. And, the adjustments are not easy to see, I'm sure I would still use a tape to measure cuts.
It doesn't take up much room so I'll keep for now. Any better suggestions?

I'd probably use that on a router table, not a table saw.

Original Incra Jig

From the Incra site:

http://www.incrementaltools.com/Original_INCRA_Jig_with_1_hour_Instructional_DVD_p/ij32.htm

Frank, I don't think I'd use that particular Incra jig on a tablesaw. Like you said, it'll be real hard to get it parallel with the blade. It can be handy on a router table, though.