i wanted a new square as my old one, although still fine is looking a little like me, worn out!, so i couldn't really warrant the money for the Martinez so i went for the TrigJig, i have to say im impressed, it has all the formulas on the degrees and the etching is super clear, i like the bubble and its also visible from the back (Unlike the Mtz)
the draw lines are nice and neat at 5mm intervals and a v shape so it doesn't need a sharp pencil all the time.
overall i would say value for money fo...