Never used the TSO jig myself but some of my club guys are full-time cabinetmakers in one-man shop environment and I have no reasons not to believe their words given their stellar track records when it comes to tool recommendations. Some have the Festool set (plunge saw + MFT set up) but still use the TSO jig and that speaks for itself.
I seldom use large plywood stock and when I do, I don't need the degree of accuracy that is demonstrated in the video.
Simon