I do play it, and I also own Palliser's book. I can simplly tell you it's an amazing opening, and I've won a lot a games in few moves, because white can get crushed if he/she plays carelessly.
I like the definition Palliser makes about this Mexican defense (or Tango) in his introduction: "The tango is a turbo-charged King's Indian" 
aka The Mexican Defense aka The Kevitz-Trajkovich Defense.
1.d4 Nf6 2.c4 Nc6
My defense against 1.d4 is the major weak point in my opening repertoire. I have played The Grunfeld and KID against it, but I do not particularly like either. I think this one might be the next one I test out, and I was wondering if anyone has insight into it. Is it solid? Is it mainly transpositional? if yes into what? Why is it so rarely played, only 770 games in games explorer, when it scores so well, 33% wins?